Players - A real life story in the works with a message on the last page to you.

[Solidify]

Now there is this very strange intense awkwardness. He still looks at me, but looks a bit sad. Finds it difficult to speak to me and tenses his whole body if I come near him.

This is most likely because he knows you understand his situation.

He said everything right in the beginning but he may just be a player.

This is your best bet. I hate to say it because you seem like you like him but it's most likely the truth. A wink is not genuine nor is it sincere. He's probably just trying to get with you. The fact that he cuts off any contact from you outside of class adds to that. Maybe he's using you for something. I wouldn't jump to conclusions but only time will tell.

My verdict is that this guy is a heartbreak waiting to happen. You've already fallen quite a bit for him and the worse is to come. Move on before the situation worsens. You don't know the kind of guy he is and I wouldn't want to see you get hurt. If he is really into you, he will chase.