Sexuality and relationship problems kinda idk

Hi, so I have a crush on 1 of my good friends we've been friends for over 2 years now we joke a lot text, and hang out in school when we can anyways I like him and he claims to be straight but sometimes when we joke around he is giving mixed signals like he could be gay or not but then when I ask him he's like no I was joking haha I straight remember and so I Js say ok and he always says to me I'm bricked up right now and I don't really mind him saying it but in school I Js make it sound like its awkward and sometimes when he says it he goes more into detail and then I start to get a lift and then we Js talk but he kinda makes it hard to talk about relationship feelings and I Js don't know how to tell him or start the convoy anyways. Also in all of this nobody in my family accepts lgbtq and that makes me feel guilty and like I shouldn't so it makes me doubt my sexuality a lot and I don't want things to happen with my family if I ever end up with him or someone else

Anyone understand or can give advice or maybe Js talk about it idk I'm new to all of this