I don't know what to do

I have a guy friend who happens to be my brother-in-law’s younger brother. We flirted alot when we first met and he had a few drinks and told me he wanted to take me out. I was just out of a toxic relationship at the time and I froze up and didn’t answer him. A week later we met up for drinks and he told my roommate he was taking me on a date. I froze up again and my roommate asked him if he was going to ask me out and he got awkward and said it would be weird with our siblings being married. The whole time I ignored him out of fear. He never treated me differently after seeing me at such a low point. He comes over to help me with things and he stares at me alot and teases me. I really like him but I’m terrified of bringing it up to him because I don’t know where he stands, but I feel something. What do I do?