Can you see what's wrong with him?

I was friends with a guy for years. A long time ago he came out of the blue and told me he had feelings. I was delighted and said I would meet him. He never called. Same thing happened again. I forgave him but pulled back emotionally. He came after me again and I refused him unless he stopped flirting etc., again no big jump from him. So I pulled back almost completely, was nice but not a friend. It was hard, I was hurt, still had feelings and in fairness, he came to think I didn't care. One night we had a fight, I still don't know why he turned on me, but after he gave me an ultimatum to tell him if I loved him. I didn't. Months later we meet up again. I am friendly, he is too, then suddenly he won't look at me, if he sees me coming he freezes and walks away, he cant even talk to me. I ask him if I had done something to offend him. He says no, he was just under pressure etc. and ignoring everyone (not true). He says the day we couldn't tell each other how we feel about things was the day it was over between us. I say, OK, it must have been just me reading it wrong thinking he was uncomfortable around me & he almost hisses that I was wrong. But at times he was looking at me with tears in his eyes and staring at me, while also trying to avoid me? He won't tell me what's up. Can you?