Why am I getting upset over this?

My guy friend and I talk on the phone every night for an hour or more. Well he kinda liked me as more than a friend and I told him I only liked him as a friend, so he is like okay well be friends and see what happens in the future. so he continued to call. Well I talked to him today like in the afternoon and he said he would call me later that night. He has been really tired lately so he wanted to sleep early. But he said hed call. Well he ended up NOT calling so I texted him and asked if he was awake and than he called and said he was about to go to bed. I was like okay I guess ill talk to you tomorrow. After I got off it kinda bothered me he didnt call and he was about to sleep and didnt mention he was going to call me. So after we hung up I started crying.. Im such a nerd. Why was I crying?? I only like him as a friend, I think …I dont know, im crazy.