PLEASE HELP!!! Is there a possibility he likes/liked me?

I'm in the same situation as you. Honestly, I think he likes you. Usually when I guy acts more serious with a girl, he likes her. I think he thinks you're a great, smart person and likes who you are. It seems to me that when he asked you all those questions he was interested in you and wanted to know more about who you were. You should definitely talk to him on Facebook!! There's nothing wrong with wanting to talk to him. Just be confident and true to yourself!! Hope this helped.