What do you think of this strange guy behavior? Does he like me?

Okay, that is a bit strange. Maybe he expected you to find him since he made the first move last time? Unlikely, but possible. Why didn't you exchange phone numbers so you could set a date to do your homework together? Since you had such a good convo yesterday, try to find him today and give him your number, email, etc. so you can meet up with him this weekend. Don't let his weirdo behavior turn you away yet!