Why do I keep doing her?

I dont understand why i keep going back to her, we're always sexual on a night out and this was no exception, it was a chariity uni night ball, and as usual me and this girl start off the night playfully hitting legs under the table at our dinner, wine was flowing and we both knoew we are attracted to one another (HB6.5, yeah I know not my greatest conquest, there just something about her I can't put my finger on it, she got a really fit face and is only slightly curvy).

I started scratching the inside of her legs under the table and she playfully squeezes my knees, When we're dancing she knows she is giving me a hard on, and I almost always bring her hand around to my cock and she rubs it through my trousers, I wanted to try out something I had seen on gambler stealth seduiction so I grabbed through her dress, one side of her underwear and gently tugged on it, girls can definitely feel this, and it was evident she could too.

Anyway we went clubbing and at one point during a massive harlem shake, some guy elbows her in the lip by accident and she starts bleeding, i went and "kissed it better",eventually we went home after more of the hand on cock and rubbing her through her dress most of the night, and I said she could stay downstairs. I had no intention of sleeping with her, just alot of sexual touching when we are out.

She stayed downstairs for maybe 15 minutes before she comes up and says downstairs is cold, and climbs into bed with me. After hugging to make her warmer I had a boner and she started touching me, and it kind of escalated from there. It was really dirty talking sex, and a seriously drunk lay, I came in her face first then fell asleep, when I woke up again we did it again and I came over her tits this time, with her licking up the remainder.

Anyway, I don;t understand why I keep engaging with her, maybe its because its an easy lay, maybe its because shes makes herself that available for me, I don't know, we get on and i've considered going out with her, but its not what I want.

Straightened things out in the morning, she was very direct just saying its just sex, we don't have to do it again if I don't want to, blah blah blah. I basically just don't want to ruin our friendship group with them, I told her this and she said that it wouldn't, so I don't see a problem.

I know I have to stop this with her but I just can't, its not oneitis as I still want to fuck other people and she knows that, it's like having a fuck buddy again, but one you don't want and do want at the same time....so confused.

I have a near carbon copy of what you have going on. We met through plenty of fish and decided to be fuck buddys, after 3-4 weekends of dirty sex she was showing signs that she wanted more. She was asking me to meet her friends,go see bands and go on road trips so i put her on ice for a while to decide what i wanted to get out of it. I would advise you to do the same, remain objective.... Ask yourself truly what you want and get it. You mentioned she is a 6.5? This assertion screams that you feel your way to good for this girl and anything more than dirty stinking sex will probably leave you unfulfilled. As a man though i totally get why your keeping her on the scene.

Yeah, I'm easily an 8/10 guy, part time model etc, so its not like I couldn't do better, its just so easy and sometimes when you're in a dry spell for a few weeks or whatever it seems like a good option, I tried POF and it just leave me feeling desperate when you always have to message the girls, so I stopped much prefer club game. It's not like shes getting attached in the same way as your girl, but I do see what you are saying about going for what I want rather than continously playing this easy lay.