My brother and I are both really close. His best friend grew up with both of us and has always been a bit of a fuckboy. My brother knows that we had a thing once when we were younger but nothing happened. After that he sat me down and gave me an overprotective big brother style lecture and warned me to stay away from him because he's a player. We fell in love and are dating. We've been dating for about 6 months and he's been loyal and loving. Should I tell my brother?? We're both adults (bro is 24 so is his friend and I'm 22)