A brother
A brother is someone you’re stuck with. They can be cool, they can be a total piece of garbage, but you’re stuck with them for life, whether you like it or not.
My brother is the worst, but I still love him, even if he calls me a f***ing loser.
Bro, you’re my brother, so you’re stuck with me forever.
I don’t know what I’d do without my brother, even though he’s a total a***.