How do I find out if he is interested in me?

He’s my brothers friend, and he asked if my bestfriend had a boyfriend. But we’ve been going out to the club for 2 weeks. and both times we’ve danced together all nite, even the slow songs. How do I know if he is interested in me and wont ask me out because he is my brothers bestfriend?? How do I find out,?? because we have sooo much in common and he knows it too. He looks at me everytime I say something I like or if we are listening to some song that we both like, he just knows we have so much in common. and I know that maybe my brother might trip, but maybe he won’t. he might want me to be happy. I like his friend. I havent had a relationship for 4 years, I’ve been waiting for my ex to hit rock bottom for 5 years with the drugs. but I’m tired of waiting I want to move on. and this is the 1st guy that I’ve been attracted to ever since my ex.