I don't feel sexually attracted to my boyfriend...

We haven't been dating for long, but I've known him for years now.

It's always been an online friendship and I never thought of him as anything more than a friend.

Well, he moves close to where I live now and we meet and everything is amazing... Except for the sex.

I don't know if it's because he's smaller or if it's because I simply just don't feel sexual attraction towards him or if it's because I've totally lost my sex drive after having my son...

I feel like a crap girlfriend because I know he wants to make me cum but I can't get there.

I honestly don't feel like I really feel him when we do have sex and I start to over think stuff and ruin the moment for myself.