<human>: * Ok so I will explain my situation. I am 21 years old. I have been with my girlfriend for about two and a half years. The way that we started dating was a bit odd and probably stupid on my part. It was around July and I had about two weeks before I shipped out to basic training when her and I started to mess around. I really liked her and she seemed really in to me. She suggested that we start dating and I was skeptical because of the obvious, I was about to ship out. She ended up convincing me so I was psyched to have a girlfriend. 
  * I shipped out to basic/AIT and was there for three months. I wrote letters to her and thought about her all the time. This created strong feelings towards her because she was staying in touch and I believed she was being faithful. When I arrived home everything seemed fine and after about two weeks of being together she told me she had been unfaithful while I was gone. I was in such a state of confusion/anger that I didn't know what to do. Her reasons for doing this was she was unsure of how our relationship would be when I arrived home. I decided to forgive her because we didn't have a serious basis for our relationship before I shipped out and agreed that it wouldn't have been a big deal if we hadn't started dating before then. So we moved on deciding to essentially start anew. 
   * She has since joined the army also and was gone for about three months. I am not for certain what she did while away for that but she claims to not have done anything. I want to believe her so badly because I would like to believe she is truely sorry about wronging me while I was away. But like some have said it is always coming back into my mind. I am quite happy with her and want to forgive and forget but I just do not know how. Does anyone have some advice for me? For us?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Got together with girlfriend before basic, she cheated while I was away. I forgave her and we have been going strong for two years but I still have trust issues. Advice?