Am I broken?

So I’m a bigger girl, and I’ve always been insecure, and lately I’ve been more confident, but a guy that I’ve always liked and he liked me, and I have decided to try the whole friends with benefits thing, and he was like we don’t have to do anything sexual, but we aren’t dating cause neither of us want a relationship, well we started sexting and i suddenly get nervous and

Don’t know what to say, and then I get insecure about the pictures I take and I don’t know why, I’ve never had this issue, what’s wrong with me?