I have been dating my girlfriend for two years, and we have been living together for one year. We are quite happy, and we plan to marry this summer. Recently she has been talking about us traveling overseas so I can meet her parents. But I found out about two weeks ago that she has been on an online dating site talking to guys (apparently looking for a long term relationship). She even went on a dinner date with one guy last weekend. I'm quite sure they didn't have sex, but I don't know if they are interested in each other or not. I have not confronted her yet. She doesn't know that I know. My plan is to be a good boyfriend, try to open the lines of communication, and then see what she does. If she doesn't quite, then I'll break up with her. If she quites, then I'll keep the secret.
The reason I don't confront her is that I want to figure out what is the root cause of this problem in our relationship, and I don't know that I will get the right answer if I confront her. Also, I honestly worry that if I confront her then there will be permenant damage to our relationship and things will not work out no matter what. I had an ex girlfriend (different girl, long time ago) cheat on me before, and after we confronted the issue our relationship was unresolvable. I don't want this to happen again.
What do you guys think? Does my logic make sense, or is it simply that I should confront her and let the cards lie where they fall? I would like to hear other people's similar stories, if possible.
Cheers