That's an absolutely common feeling among survivors and it's good you ask about it. If you think back to when you were a boy you may well see that you had a lot of self-esteem problems and didn't think you were worth much. Abuse does that to us: we think it was all our fault and that we deserved what we got. We also develop problems trusting people and wonder "what does he really want?"
On a site like this those two problems can come together and make a guy wonder, "Okay, what's really going on here? Why is everyone treating me so well?" I can't say you will never ever be treated badly here, but if that happens just tell a moderator right away. This really is a great community and a safe place where we can begin to undo all those false lessons from our past.
You are treated well here because that's what you deserve.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)