Not sure about my relationship

We started off as really good friends and now we’ve been together for two years. He asked me to move in with him when we literally just started dating, because I had just graduated from high school and my dad kicked me out of the house, with no where else to go. He’s truly my best friend. But now it feels different. He’s drinking more, he never seems to want to spend any time with me, it feels like I’m putting in all the effort, when I talk to him he brushes it off. I keep finding that I always make up excuses for him like, oh he’s just tired from work and wants some time to alone, it’s fine. But the more it happens, the more it bothers me. Currently he’s been at home waiting to start his new job and it’s still happening. So that excuse I make for him went out the window. I’ve already tried to talk to him about it and he just said that I’m overreacting. But it’s everyday. He doesn’t talk to me AT ALL until I talk to him, or he’s drinking. I don’t know what to say or do at this point.