Hey D
20 months. That is amazing. I hope you are really proud of yourself because that's a huge achievement.
I'm sorry your family doesn't seem supportive. Feeling not 'a part of' is hard for sure. I don't know what they are thinking or why. I can only say that what you're doing is for you and I know you know that.
Not sure how often you see the family. If it's only a few times a year (like me, if that really) they may need time to get used to the new you. And maybe you're still figuring out how the new you relates to the same old them. Family dynamics are tough.
You're an inspiration!