I like him a lot but he's making matters complicated, what should

I like my brothers best friend, my brother is a pretty strict guy but he can also be really fun to talk with and hang around with. I’ve been to numorous places with my brother and this guy I like since he is my brothers best friend and each time he does something that catches my attention and makes me fall for him even more. Like the other day I was at a party he was also at (another one of my brothers frinds b-day) and he was there. I was standing on my own and he just grabbed my hand twiled me around and started dancing ONLY with me. I’m an overwieght girl so I felt very special and warm with him (he was drunk I guess I donno) But a few weeks ago he was at my house completely ignoring me. Arent people honest usually when they are drunk, I mean I donno what to do, should I confront the guy I like but risk the possiblity of him not eve are showing up at our house or should I keep it cool? I donno what to do since I am 17 years old almost 18 and I’ve liked him for the past 2 years. I’m loosing my mind over him. Havent been getting much sleep lately, I donno what to do! Please Help!!!!!!!!!!!!