Fucking sick to my stomach after realizing he’ll always be my brother

I (f23) went for a run yesterday and it was pretty hot outside so I wore a casual sports bra and the tiniest shorts I have. I was in the bathroom getting ready for a shower when my brother (m23) walked in. He said he needed to use the bathroom but he didn’t and just stood there looking at me. I started getting upset and asked him to leave but he didn’t move. He just stood there. He didn’t talk at all. I’m fucking mortified. I was absolutely livid and so upset and I just got dressed and left. I live in a 1 bedroom apartment with him and I’m currently at my dads house. This isn’t the first time he’s done this. Anytime he hears me in the bathroom he’ll just walk in. I told my mom and my dad about it. They said I should be more aware of what I’m wearing when I’m home. Fuck that. I can’t believe my dad is pissing me off. Usually he’ll side with me but he’s being an asshole. My brother is such a fucking creep. I’m grossed out. I never want to see him again. I’ll always have a brother. I’ll always have this fucking creep in my life. I fucking hate that filthy piece of shit.