Please help me come out to my friends/ family

So I’m bisexual and I am 13 and I know that my parents would except me but not my stepdad. He would hang it over my head(probably). But I really want to tell my best friend Ella. And I’m really afraid that she will be kinda weirded out. Idk.. she has always accepted me for who I am but I’m afraid that we will get distant. Also, thinking back, I call everyone either dude or bro, I kinda at my old school like pretty much only hung out with the boys and people thought that I was kinda a thot of boy crazy. Also I just realized that when me and Ella were in like fourth grade, I asked her “if we can’t get husbands when we grow up, do you want to be lesbian with me?” And she thought that that was rly weird, I also have a lot of depressing thoughts so I have wanted to do self harm multiple times, and done minor self harm so my mind needs to rearrange ig, I’m in 7th grade at a new school and come from a private catholic school. My new school is a public school tho. But plz help me.

Edit: I came out to like 4 friends (including Ella) and one of my friends the next time I saw her, she kept on making jokes about LGBTQ+ people and it made me feel really uncomfortable, and then she would kind of have pity on me for saying it, as if she felt bad for me about being bi.