Dating best friend brother

Have anyone ever been in a relationship with their best friend sibling? I’ve been on one date with my friends older brother once this week and he’s invited me to another this weekend. I really like him. Always had a crush on him when I was younger. I know he’s into me and my friend tells me he talks about me and we text all the time now but I’m worried about if we have problems later on how that will affect me and my best friend relationship.