Not to be a dick, but you sound like the type of guy who would bring a girl you have known forever to a party n she would be sucking dick in the bathroom while u looked for her...with that being said here's what you do to stop being that guy...
One u have known her for three months, she flirts, and u have never made a move why?? Next...am I family?!? Wtf?! Who wants to be this bitch's family?! I just wanna fuck...that's super arc bro, who gives a shit if she likes u as long as she Fucks u. Two...you seem like u r way to available! You are her little play thing, you are her moodle. The guy who will go shopping with her, hold her bags, n look like a dog when she dangles the idea of sex in front of you. Next you don't own her. Why should she NOT go out n look for sexual partners?! You haven't even ever kissed her...n im sure u sent some little pissy text to her like "way to hit me up last nite" something that screams im desperate and about u. I would put alot of money on the fact that she has already deselected u as a possible fuck, but likes to know she could have u. I also bet u r scared to be sexual around her which means u never will be. I would never have said am I family...but if I did n she asked if I wanted to be id say somethin like "id consider kissing cousins

" I know it probably sounds like im laying into u n I don't mean to be. Im just pointing out things u may not be seeing, plus I know those r probably the parts u wanna kill of urself anyways. Now...should u drop her...*grabs megaphone* GET RID OF THIS BITCH
She doesn't want to be with u. She makes u an option while u r waiting around. She already fucked that guy u saw in the picture cause he pulled the trigger. She may or may not (id say stop being so egotistical she could've fucked that guy n then found out he is a pussy who knows???) have clowned u on fb...do I really have to keep going???
What you need in life is more confidence n sexuality. Any girl I meet will know im a very sexual person. I lace what I say with sexual undertones, im flirtatious, n im "just a handsy guy". Also, when it comes to girls make yourself less available. I will purposefully NOT hang out with girls when they ask, cause I know the excitement will build n if they tried to see u thewill again. Then when I do see them, I double down on sexual tension n have a much better time. Also 3 months sound like a crazy amount of time tolive in fantasy land..what I mean by that is a girl knows if she really wants to fuck u pretty immediately. It shouldn't take u 3 months to attempt tokiss her. In 3 minutes she knows if u r acceptable...then u just have to play correctly. If u r got her number n r kicking it with her u should make everything tied to sex, n not just sex, sex with you. She says "I love chocolate" you say "ya it can be fun, but you'll have to clean my bed when we r done

" don't try to make it this secret plan u have that u want her. Lether know...if she is into it she will be giggling like a school girl telling u how bad u r (n how much she likes it).
*drifting because I just read ur 2nd post n edit is this next section...
So she ljbfed u n u still talk to her?!?!? Fuck her dude...also she didn't start giving u strong ioi's...u started viewing what she was doing as ioi's. Like she told u she wanted to be friends n from the sound of it she sat u down n it was a little thing...in her head she has clearance to toy with u cause she told u what's good. Like...if u hadn't been ljbfed n first went to her apartment n she changed in front of u slowly....ioi ..if she ljbfed u n she happened to change her shirt in front of u...NOT ioi u know what I mean? N ya girls don't wanna hear about how u wanna marry them...they wanna hear how u r gonna fuck them silly n they want u too. I bet u half gamed her too didn't u...u like tried somethings n she thought u were interesting. Then u were scared n didn't try to escalate or make any moves n later wondered what was up. You pulled the afc of realizing u couldn't just fuck her so u like told her u liked her n whatever n then that's when shesat u down n ljbfed u?? I know it went alot like that for u...it went alot like that for me ONE time in life *gasp shocked looks from the crowd* it definitely blows...but u gotta get her out. She is toxic, she knows how to play u, n u havnt developed the confidence n game to notgeg played yet...so just run away n never lookback. If she hits u up becheery as fuck n never able to see her cause u r living an incredible live that she's not lucky enough to be a part of it. If she creeps ur fb...only dhv updates...u rnt tryin to game this Bitch because chances r even if she later gave u a chance u would afc it up cause she knows how to play u. Instead u gaming her consists of doing whatever to make her think I shoulda banged him before he was too cool for me n that's it.
Again...its alot of tough love...I hope it helps.