I'm sorry. [Not about the slap, not sorry about that.]

I'm sorry that other people hurt you, I'm sorry that your brother is so heartless. But that does not make it okay for you to treat other people just as badly, if not worse.

We didn't do a damned thing to you and I'm sorry but not being able to feel doesn't give you the right to crush everyone else's feelings by being so cold and negative all the time. Like it's our fault you're in this situation!

It's not!