I've totally been there. With me, it was my significant other cheating on me for three months. I was constantly catching him in lies, calling him at work and he wasn't there--that whole bit. This was 4 years ago. We've worked it all out, gone to counselling, etc, etc. But there is still that little voice of doubt that questions him occasionally. And I don't think I will ever be able to trust anyone 100% ever again.

Over time, it will get easier--you'll become less neurotic and paranoid in your relationships. But you will always remain a bit guarded. Always on your toes, wondering if the other person is completely faithful. But maybe that is not such a bad thing. We never truly really know anyone, and to think otherwise is just asking for trouble.

mara