Coming out to my family

Since I was maybe nine, my mom has told me pretty regularly “you like boys, I just know,” though I am now positive that I am 100% lesbian and I’m so scared of the day where I’ll have to let her know that that I’m not straight. I’m afraid she’ll be dissatisfied with me and disrespect who I am, because I’ve seen similar behaviors from her. My brother is in the same boat except he’s not pressuring me to be straight, but he instead antagonizes, and dare I say is disgusted by the idea of homosexuality, though he makes no effort to harm the LGBTQIA+ community in any way.

Any advice would mean the world to me. ❤️