my opinion: you still being with him is telling me that you guys are overcoming what has happened in the past (him cheating), which is a good thing! You say he has changed and matured which is also good.

However, I feel it sounds a bit weird that he does not want to go to the wedding now that the girl is "supposedly" going to be there. I mean I may be wrong, but all that stuff should be in the past now (for YOU and HIM) and this girl should not affect how you and your boyfriend live your lives. Its his friend's wedding and he doesn't want to go there because of this girl? It seems he is not even thinking about his friend and his friend's special day.

You are not a silly girl if you forgive someone, especially your boyfriend who has supposedly changed and matured for the better. If you are having doubts and can't seem to trust him, then maybe you should consider ending it or going to couples therapy (just a possibility).

One of the hardest things to do is regain trust, I know that. But if you agree to stay with this man, you need to learn to trust him, especially since he hasn't done it again and you say he has matured. Give him the benefit of the doubt.

Think about this: Does he really have a problem seeing that girl or do you have more of a problem?

If you fully trust and love him, it shouldn't matter if you guys see her there. Also, it should not matter to him if she is nothing to him now!

Hope this helps, stay strong!