My little brothers swim coatch he's so hot but I don't know if he's married?

I'm 19 and he is well he's older about 35 (but he's not like an old man he has a hot body) and I walked in the changing room because my brother left his bag and he was just showering naked and I was like sorry and he just started talking to me while he washing which was odd but now we chat a lot and I really like him but I don't know if he's married, I asked him and he said no but when he was showering he had a ring on I remember that I just don't remember what finger, I just don't want to be like his bit on the side I want to know if he's single for me lol :P