I don't know what Moroi or dhampirs are but I'm sure they would want you to take care of yourself just like you take care of them. My powers don't hurt me but I put myself in danger each time I use them. Being a superhero isn't easy and there's a lot of them that end up hurt but we do it anyways because we care. I wouldn't call that selfish at all.
Good news on that front. I've been home and I returned literally at the same place I was before this place took me. The court won't notice you've been gone. Being here is like living in a small pocket of time, completely separate from our worlds. It's like a small vacation! With dinosaurs.