Ok, so I am rather new here. I am still processing most of the material and testing/trying it on girls. Which landed me in an odd situation.

So yeah I met a girl in which I am not interested in a romantic level but in a rather sexual one. She stated that she wasn't interested in a relationship with any guy at this point in her life. But there grew a sexual interest. Ever since I asked her whether she would like to be friends with benefits(she said yes) things got really heated up to a level where she was begging me to 'have her'. So we picked a day everything was arranged (the day is still in the future).

Then a few days ago shit hit the fan. I haven't heard her for a few days and suddenly she pops up with a boyfriend. I just felt disappointed why she said that she didn't wanted a relationship but then ended up having one and the whole situation just caused my interest in her to tumble down at a very fast rate. I answered her messages abnormally late and sort of ignored her most of the time.

But I noticed something odd, whilst my interest in her crashed she kept searching contact, and she kept seeking my approval. (She always initiates the contact) She talks not about the new guy, but she kept trying to have fun conversations. E.g: after a night out she texts me in the morning to ask whether or not I had a great time (how much I drank and how she is interested in seeing me in a not sober state) and when I pop in she's always the first that wants a chat.

So what would be the best thing to do with such a situation? Clearly I lost, the other guy could provide a better package(romantic+sexual) that I couldn't(only sexual). And I am not mad at that a bit saddened because I find it her now a waste of time.But here it comes should I act like nothing happened, confront her, keep ignoring her and part my own way?
Currently I am planning to keep her around if I encounter a hot friend of her but apart from that I am not so fond of keeping her around.

So yeah, what do you guys think of this whole, to me odd, situation and what would you do being in my position?

This is the second time I encounter such a situation, I had another girl which I was interested in in having a relationship with but I blew it and she became a friend (I learnt why and learnt my lesson from it). Yet she specially wears more revealing clothes when we are going out and asks my opinion, which I reply: the less you wear, the happier I am.

(Being the second time that it happens was the thing that made it feel odd and being the reason why I am seeking an opinion on this matter)

The confronting option seems to me the bad option. That shows you are needy and emotional about it. Very unatractive. One thing you should learn over time is to NOT CARE. You get rejected ? DON'T CARE. The girl has chosen someone else over you. DON'T CARE. There are options enough. The fact you feel dissapointed is bad. That means that in your world she has more value than you which means that you didn't deserve her in the first place. Your mindset should be: "She could have had the best man in the world but she has settled for a dumbass. I feel pity for her.". You see, though maybe not true, but you should think of yourself as if you are the absolute pinaccle in the world. Nobody is better than you. You deserve all the women in the world and if a woman wants to date you she better prove herself to you. You really should start believing this.

You can just stay friends with her. Go to parties with her. If you have fun with her, dance with her on parties, other girls will see that and your attractiveness will increase. Use the girl for your own benefit.

what a girls says isn't the same what she thinks.

you either are in the friendzone or she's checking if you're better boyfriend material

Actually I never really wanted to be her boyfriend, and I stated this to her multiple times. She's not my type of girlfriend material. I wanted to be single, she wanted to stay single. I am not an expert but I got her to the point where she actually texted me that she wanted to fuck my brains out (followed by other things she wanted to do to me), so I am not really thinking I was in the friend zone at that point.
Sorry should have cleared this up a bit more. When I said that I felt disappointed (felt disappointed in her), I rather felt a little bit like: 'Silly girl you just pretended that you didn't wanted a relationship just for my attention and you fall for the first wussbag that asks you for one'. (Yes the guy acted as a total wuss: admitting to a girl that you like her like a teenager would do is something I consider being a wuss).
So that's why my interest just went into the sink. (Is this a good reaction?)

Thanks for the replies.

I suppose I did the right thing when she told me she had a boyfriend, I think. When it happened, I simply replied a message with 'standard our of the box' boring congratulations, and just went on like nothing really happened. But my interest, it was gone.

But then the part I don't get is why she is doing like nothing just happened and continues to seek my attention even more now that she has someone which she can give all her attention to. And she really keeps her mouth shut about the new boy.

Anyway it's just everything is new to me (only been 'experimenting' and reading for like 2 months), and all of the sudden I get odd reactions from girls. Reactions that there were never before (envy, flirting, talking about sex, ...) usually from the group I don't need those, namely the girls who are in a relationship. For example when I am out with a group of girls where none is single, I usually find one craving for my attention, yet she is not single. (And sometimes things turn rather flirty and sexual)

I don't know whether or not I am going the right way with all of this. It seems to me I attract none-single girls. Like this case, she suddenly has a relationship yet she's still there wanting my attention.

OK, so you did the right think. Now it is time to move on. You can stay friends with this one but focus on other girls. Go out sarging and enjoy it. Don't think too much of this girl. She isn't worth to be with you.

You got too logical by asking her if she wants to be friends with benefits.

Instead just get her in person, escalate and handle the expectations later through your behavior.

It's almost never a good idea to discuss the two of you hooking up or having sex over the phone or text messages before you've actually done it in real life. There are exceptions once you're REALLY good, but for most guys it's better to avoid it.

JS

Ahhhh, yes you make it sound all logical to me. I'll just keep it for when I meet 'em in person. Thanks for pointing out my error.