Your brother doesn't want you to move out because he likes having you near your mom. That's my guess. His opinion is one thing, but if your mom needs you, that's another.

Why can't your mom move with you? It seems to me like she needs something to look forward to. A new adventure. I know that idea is fraught with potholes--she probably doesn't want to leave the place where she lived with him just yet. But maybe that's a possibility?

There are so many possibilities! Be creative. You'll find a way.

Karen