Why do I feel so heart broken?

Nothing bad happened. Today was the last day of school for me, and for the last day of school I told my crush I liked him, he wasn't surprised or disgusted he had actually had a smile on his face right after I told him that. We've been friends for half a year and he never had the guts to sit next to me in cl til today when he finally had the guts to go up to me, take his chair w/ him and ask for my email. Once he did that I couldn't be anymore happier, but once I got home, I went to his profile on some website and my heart started to hurt for some reason. :( I just wanna see him so much right now.