Really weird crush

Stephanie

So I‘ve had a crush on this guy for about two years. He has never liked me, I don’t think, and when I first met him he had a crush on one of my best friends. Last year my best friend and him started dating, and they only dated for about two months, and then broke up. My crush then went on to talk to me about how he was going to try and win her back, and always was asking me if he if I thought that she still liked him. But lately, and over the summer, he has been showing a lot of interest in me and flirting with me. I don’t know if this is just him opening up to me or if it’s him showing that he now likes me. Even my closest friend (not the one that dated him) noticed that he has been a lot more flirty with me. Any opinions? Or advice?