Well, I know this is the wrong section, and probably frowned upon by moderators that I'm knowingly posting in the wrong section, but this is something I was hoping I could have addressed, as it's slightly urgent. If you will humor me, I'd much appreciate it.

The situation (Not to be confused with the asshat on MTV)

Basically, I met this girl fall semester of 09. She was in my class, and at the time had a boyfriend she was completely out of love with. She felt something strong for me, and we were always partners, but never hooked up. Just planned on hanging out to celebrate our A on a group project. From there, things broke off, she quit the class because she couldn't cheat on her boyfriend, and said she couldn't resist me.

The problem

3 months later, we had another class together. From there, we started screwing and LTR almost instantly. Her EX was her EX of 3 years, and they have a dog together. (He used and uses this to keep her close.) Things got rocky 6 months in, and it ended. She went back to her EX, taking the easy route. (He's got plenty of $$, the dog together, and a house. I have none of the above.)

From here, I was broke, but found a new girlfriend. Months later she texted me to trade stuff. We did, and from that night the sparks were flying. I was cheating within a week with her, and it took about a month to break my relationship with current GF to go back with her. Apparently it took me too long to leave my GF, and that hurt this girls trust, basically revoking all the love and miss she said she had for me. So we slowly started to build, and kept seeing each other sparsely, always screwing or having a fun time, but not talking too often when not together. (Hot together, cold when away.)

Anyway, she's starting a medical school program on monday, and working 2 days a week. This will leave her with mmm..Let's say 20 hours of free time a week. (That's generous.) Unfortunately, I love this girl. I've got one-itis. I want to keep her too, but she says there's just too much going on. Hell, I'll use any method at this point to keep this girl. If we break this time, and sleep with other people, I'm simply too prideful (probably an asshole) to ever be able to sleep with her again.

Where I'm stuck now

I tried a method, of not giving her an option. Taking control, and being dominant. I told her "I'm coming over tonight for a minute when you get off."
She replied "What's up?"
Me: "Me. I'm putting some clothes on. See you in 20."

Well, she wasn't there, fact was she was still stuck at work. So I called her, and we started to argue. Said we hadn't made plans for the night. (Fuck. Backfire.) Said she just didn't have time, since she was getting up at 6AM from now on (It's 1 Now) and is going straight to bed when she gets home. Basically it ended in a:

"All you think about is you" from me, and saying "Just call me tomorrow, I want to trade stuff. Bye." *Click*

So, my lack of relationship experience has screwed me. I've clearly played the wrong hand, hell I think I'm playing Poker with Uno cards.

May I mention that either she's a liar, or T-Mobile is the devil, because she said she sent me a message saying she'd be at work late and not a good idea tonight. Of course I didn't get that. She also says she didn't get mine about putting my clothes on and heading over. Hmmm..

The solution

Durr...Herp Derp..Dunno

this girl is ridiculous, she broke up with you to go back to her ex so it's normal that when she came back to you, you feel uncertain she's gonna stay with you. if she left you once she can leave you again, right? And still she accuses you of staying with that girl for 1 month?!? she has no right to acuse you, YOU should be accusing her:
1) for leaving you
2) for accusing you

more so, she's a liar lol... or maybe t-mobile is the devil

you let her get away with all of this.. so the situation is that she has the upper hard now

well, you know how she gets jealous when she sees you with another woman. Don't break up with her, but start seeing other women. anyways she's gonna be meeting other men at school, the same way she met you

I have had similar thoughts on the leaving situation. I feel it's too late to go back on the situation for her leaving me, and the accusations were on point, because I was still with the girl while we began to hookup again, and she knew that.

I played it well at the start, but shouldn't have played it out so long. That horse died, and then I tried to stand it back up and keep whipping it.

Of course this morning I woke up to an "I'm sorry for being a bitch" text, but still told me I had no place doing what I was attempting last night.

My thing here is, I'm trying to lock this girl in, so that she won't have an opportunity or eyes for anyone else while she's in school.