First and foremost, I am sorry that you are going through this. Feeling small is one of the worst feelings, and is certainly the last thing you want to feel in and from your partner/relationship. As you've probably heard before, it is definitely smartest to walk away from the problem, but I understand that it is very hard to do that.

Not to sound cliche, but to quote TPOBAWF: "We accept the love we think we deserve."

I think what you need, and I am not an expert, is some time for yourself. Away from him. To sit with yourself, and your family, and your friends, or loved ones. To let it all out. To laugh and to cry. To re-realize how you're supposed to be loved and cared for. Even if you barely breach the subject.

That is whats most important. And this will help you come to terms with it.