Ex-boyfriend helppp 0_0

I broke up with him, which I was forced to because of my parents. I still love him, and he was super sad about it. He still walked with me to lunch though, and talked with me. Then the next day I said "Hey Garet!" and he looked at me weirdly, like I wasn't supposed to talk to him. He kept looking at me in science and when I looked back I smiled and he frowned and turned away. I asked what was wrong and he said "I don't want to talk about it." WTF?! I dunno if he wants to be friends either.