So a couple months ago I met this girl, but I already had a girlfriend at the time, and ended up leaving her for this new girl. We are in college, she is a couple years younger than me, and I have more relationship experience. We started spending all of our time together, sleeping together, and eventually I took her virginity. After a month or two of basically living together, she started calling me her boyfriend. She always insists she likes me so much, so I let her all the way in my life..showing her everything I could give her. Now she tells me she loves me. Part of me thinks she just wanted me because it was something she couldn't have, but she insists she's just SUCH a good girl and would never have started having sex with me if I still had a girlfriend.

Anyway, the other day we got in a fight because I felt she wasnt giving 100% and when I asked her about it she got mad(bad sign, right?). I felt like this because one night, I came over, made her dinner and watched a movie with her and she didnt want to have sex, and told me she was too tired(bullshit), but we ended up staying up til 5 am talking. Now, the next day I was pretty upset with her, and although we had plans to hang out that night, and she knew i was upset, she told her friend to come up (she lives an hour away) and they got pretty drunk.

The next day, her roommate was saying she had so much fun that night, and I found out they went across the hall to her neighbors place to drink with this guy. Now, this guy lives right across the hall, and comes over a lot, even when were hanging out. He never seems to stay very long when I'm there though, and her other guy friends always come hang out for awhile. Anyway, the next day while im at her place he comes over with her laptop (wtf?). I find out that she let him borrow her laptop, and her bubbler(she smokes a lot of weed). I already had noticed something weird in the way he looks at her, and that she treats him like she really likes him. One time, while we were taking a nap in her bed, I heard her get up, bring him over, smoke with him and she gave him a ride somewhere while i was sleeping...bothered the hell out of me. She mentions him all the time, and it seems like she knows a lot about him to just be friends. Anyways...she claims im the only guy she looks at, she loves me, i took her virginity blah blah blah.

But last night right before she fell asleep i told her I was gonna back off and give her some space, that im not gonna date someone who gets drunk when im pissed at her, and that im not ok with what she did. She got pissed and tried to give me the silent treatment, saying she didnt do anything wrong. However, I didnt cave in and told her its not ok...she ended up agreeing that she needs space and didnt know i was that attached to her(she sayin she loves me..wtf does she expect??) Almost like magic, she starts kissing me, and we have some good sex...she wanted it so bad, its like it was turning her on that I was putting my foot down. Shes usually super shy and I usually have to work to get her in the mood. I wonder if she's kissed this guy...or even f****d him because i've never heard her say anything during sex but this time she was really feeling it. She was asking me "how do you like it" and she had a great orgasm..which she never does...

Anyway, im pretty sure she likes this guy. Ive seen her front him weed, give him rides, talk about him, and she went over to see him when we were fighting. I dont smoke or drink anymore because I'm on probation, so it sorta puts a strain on the relationship. I think I just let her in my life too fast and she thinks she can do anything even if it bothers me. She gets mad when we talk about it, and I think part of it is just immaturity. If she really was serious and didnt want to lose me she wouldn't go get hammered(with other guys) while im super upset right? Im asking myself wtf is going on between them..but she denies it....and now that i said i'd give her space i'm not about to badger her about it. Should I start doing things with other girls to make her jealous? i have a feeling i should...what goes around comes around right...? or should i keep asking her although i feel shes not being honest? i dont think she really knows a relationship takes dedication. She's starting to show signs shes losing interest...she knows i'm always thinking about her and wondering about our relationship but it never seems to bother her as much as it bothers me.

I also don't think shes quite ready to accept that she has to "walk the walk" if she "talks the talk", so to speak. She claims im still her boyfriend though and shes not going to do anything behind my back. What should I do? If shes playing games, I can play them too. I don't think she realizes that because I actually stopped doing things with other people because she always wanted me to come over. I think she thinks I'm in the palm of her hand...and that she feels too crowded. But I know she doesn't realize what she has in me...because I could replace her. Fast. I don't wanna hurt her because she acts so damn innocent all the time, but then again she was talking to me hardcore when I was dating someone else...not so innocent right? I could just dump her but I really dont want to find out I was right about her liking this kid. I think if I let her go completely, she would go after him. She says she doesn't want to lose me, but I think she needs a reality check. She claims she would "bend over backwards" for me, but she never really has, even though I do it for her all the time. Maybe she only wanted me all along because she knew she couldnt have me, and maybe shes talking to her neighbor and wants him because she knows she cant have him? Is she too comfortable in this relationship? Opinions please? Thanks for reading