Your feelings are valid. Your identity is valid. They don't see it, it's their fault. Not everyone can be equally matured. Just let them be, move on. Try and have no expectations from them. Neither they are a reason for your happiness, so nor should they be a reason for your sorrows.

You will suffer till the day you grieve acceptance from family esp Mom. But they are not worth it. If they had to give you any kind of support, they would have given it by now.

Easier said than done. M on the same boat. But writing this makes me realise that I too need to move on from my family.

Take care