<human>: So i broke up with my girlfriend of 2 years i'm 23 shes 20, she is mature for her age and great to be with.  the problem, i broke up with her because i thought i didnt want this anymore and in a couple months work is going to take me across country and blah blah blah.  But besides that the relationship was fun, we were living together and having a decent time.  I do have some problems opening up, expressing true emotion (years of raising myself and 4 years in the military) so there was that big problem of I dont care enough to express how i feel etc, etc, etc. but that is stuff that i legitimately want to change to get back with her, because come to realize i do want that, just not the jump to living together.
  we used to have a nice apartment in san diego, but me getting ready to move, my lease was up and I went to stay with a friend until I was moving across country. And then ended our relationship right there. So basically we have been separated for 3 months now, and in the last month we have been seeing each other a couple times a week and kind of agreed that we would start to fix our relationship and work on it.  But today I find her at my buddies house sleeping in the same bed as my friend.  obviously a little pissed off, I tell her its fucked that she would do that after we agreed that we were going to start working stuff out, but then she said she didnt sleep with him, I believe her, because she also mentioned that they had slept together but previous of when we started hanging out again.
 So i laid it on her that if she was going to give me a chance she isnt going to do shit with that guy, and give me my shot.  I think she is going to give it to me, but I caught her in a lie.  she told me once with my friend actually ended up being twice.  i know its not big, but its the little things that keep adding up, and its really hard for me to trust her.

should i even bother?

Can you summarize the given text in a few sentences?
<bot>: broke up with ex, mistake, want to make ammends, been broken up for 3 months, turns out she slept with my friend on a couple of occasions, lied to me about one, is she worth trusting?