I really like this guy a lot?

I've known him since January. He gives me that insane butterfly feeling where your whole world stops and yoy focus on them. He makes me soooo happy and we always laugh and smile when were around each other. Not only did we see each other a lot but we also texted a lot as well. Last month, he randomly stopped talking to me and I confronted him about it nicely and just asked him why he hadn't texted me and if he didn't want to talk anymore. Things kind of drifted from there. We have(had) a great connection and everything he did made me think he liked me. We had so much fun together. Lately I've been finding myself missing him waaay more than I want to be. I literally can't stop thinking about him at all. I wake up and think about him and when he used to text me in the morning. During the day he's on my mind too. When I go to bed I'm also thinking about him, we texted a lot at night. He gave me that giddy feeling, and he told me I made him happy. I just don't know what happened. I want to text him, but I don't know what to say. Help please?