my girlfriend keeps lying, sorry had to switch users i dont want her to find out Options

[pwnage5189]

so me and my girlfriend have been talking for about 10 months. and we just started going out a little over 4 months from now. me and her were fine, and we were falling in love. and she claims to love me and i loved her, but she lied to me. For a long time i knew she had 2 previous partners, one was her old bf, and the other is a really good friend of mine ( who she swore she never slept with, but later he told me they did and she later admitted to it). Now i have no big problem with those two, but i heard rumors about her kissing a guy before we started to go out, and when we started going out i brought it up, and she said she had only made out with him. a week later she said she had done more with him, and then a week after that i sneaked out that she had sex with him.
Now i don't have a big problem with this but, after that i was talking to her again about some friend that she had that she made out with before we were dating. a week later i found out she did more with him, and then after that i found out she had sex with him.
Now this one pissed me off a little. mostly because this was the third guy she lied to me about. On top of that I found out that she had done " everything except sex" according to her to another guy. Now to be perfectly honest i don't trust her. I think shes lying to me again.
I've talked to her about it and her rationale is that there are some things that she doesn't want to tell me. which is ok but when i find something out she either needs to stick with her story or tell me the truth. telling me that she lied over and over again for 4 different guys is ridiculous.
I thought I loved this girl, but now i just don't know. She really is special to me and i want everything to go back to the way it was before this happened, but i don't know if it can.
on top of that she is leaving for spring break in march without me. and she says that she is going to be with here roommate the whole time, but how can i trust her not to just find some random guy and in her words " just make out" with him.
I've told her my feeling about the subject. but even though we talked about it, I still feel that there is something keeping me back from being able to love her as much as i did before she lied to me.
Do any of you guys or girls have any thoughts? I mean she did all this before she went out with me, but seeing is that we haven't had sex or anything like that i feel that she just likes to find a guy for a quick lay now and then. I mean she tells me that i am her really only love and that she has never felt this way with anyone else before. but how can i be sure that its not just a lie and that she really means it about me.

thanks for anyone who can help.

[Impressive]

In the words of t-pain "You've officially been chopped and screwed!"