I have come out to like, all of my friends, I mean, there was that boy who accidentally got into my sorta girlfriend's diary (me and this girl have crushes on each other, we're not really together but we act like it. She is bisexual and I am queer). Anyway, I have come out to my parents, they accepted but it still felt awkward when I talked to my mom about changing my sexuality to questioning (I had originally labeled myself bi, then I went to questioning because I was confused, but in the end I feel better labeling myself queer). I suggest asking your mom if she would support you if you were LGBTQ+, (that's what I did) and then telling your parents. If they already know, and are just acting like you're straight, just tell them: "I know you guys still think I'm straight, but the truth is, I am lesbian, and you are just going to hafta learn to accept it." Hope I helped!