What does it mean when a guy sits next to a girl randomly after sitting in a different spot for 3 weeks?

Sparklemmm3
So there's this guy in my class who I find attractive and i glance at here and there. I don't know if he likes me but for 3 whole weeks he was sitting in the front of the class and then all of a sudden he decided to sit next to me. When he sat next to me he was constantly messing with his hair and then answering all of the questions the professor was asking almost as if he was trying to show how intelligent he was. He hasn't initiated conversation but we laugh a lot here and there during lecture and I've started talking to him. Do you think he's interested?
What does it mean when a guy sits next to a girl randomly after sitting in a different spot for 3 weeks?
1 Opinion