Hang in there! I am struggling with insecurity also. I posted a thread here about 6 weeks ago. Since then, I became a bit more confident (not because of posting though). I really was on a roll last week, then I flopped this Monday morning and became very insecure. This time I told her about it.
I think that you should have the talk with him, as the others have recommended. I didn't read the whole thread. Maybe you did have that talk.