My girlfriend and I have been on and off for the past 6 months. She liked this other guy before we started dating and now I'm confused if I should trust her or not with him. She also hasn't shown much interest in our relationship. What do I do?

Why are you confused now? :confused:

Sounds like she's not as interested as you, and not completely interested in you.

If you are OK with a casual relationship without ties or commitments then that's fine. But you posted here, probably meaning its not.

You need to back off. If she really is interested, shell come back. If she's just using you, well, she still might come back, since the chase is part of the fun.

Generally speaking, she's either not ready for a single relationship or not ready for one with you. That may not be a bad thing for her... not everyone needs to have that "love of their life" relationship.

But it sounds like its not enough for you to be her distraction when she feels like entertainment. Move on. Find some other people to date. If she's really interested in you shell come around. If she doesn't, you didn't waste any more time on her.

It is truly a let down when this occurs in relationships. If you get the feeling she is not interested in having a relationship, then you should talk to her about your feelings and see if her disposition changes. If you have already done this and/or her actions did not or do not change, ending the relationship is the most sound thing to do.
No matter how much you feel or care for her, if she does not want to be in the relationship and is only stringing you along, both of you will be ultimately unhappy.
There is nothing one can do, except delay the inevitable, by holding onto something that isn't there in a person whom does not want to be with them.
If not with her, you will find someone who does not bring along questions or concerns of distrust, and you will find yourself a lot happier.

My girlfriend and i have been on and off for the past 6 months. She liked this other guy befor we started dating and now im confused if i should trust her or not with him. she also hasnt shown much interest in our relationship. what do i do?
You know what to do.. play her like she is playing you.. lol.. no don't do that... but really you need to let her go or ask if she is in it or not, tell her that you don't have time to play games and make her feel like you don't got time for her since she is all of that, she doesn't have time for you guys.. that only means she has time for some one else..

Move on and have no contact. Too many offs for me to believe this is a healthy relationship.

You need to decide if a casual, on-off situation is acceptable to you. If so, then you have nio problem. If not, then forget about her and move on.

If you want a serious relationship and not an on off one you need to cut her off.. . She'll know where you are if she wants you, but don't hold your breath move on and date