Do you think he's interested in me?

ok... I like this guy for like 3 months now and he just makes me go crazy. He is a friend of a friend, the son of my coach, the brother of a friend. He is connected to me a lot of ways. I see him almost every weekend during this volleyball league I play in and so does his mom and sister, so we bump into each other every weekend. We bond and have a great time, but usually someone else is there. Well I really want to go for him but one of his friends which is like a good friend of mine says he's never had a girlfriend. I dotn mind that fact, but im scared he he really doesnt want one and he'll turn me down if I ask him out. Im unsure if he's intrested in me. What are some signs that he would show when we are together that indicates he is intrested? Im so scared to ask him because im horrible at rejection.

well if a guy likes you he is either mean or nice and gets kind of physical