Whats he thinking?

We used to talk day and night like we were together, but now we don't talk that much and I like him a lot? What should I do? He did propose me before but I didn't think it was serious. I can say that he kinda proposed in a playful or like a "not serious" Manner so I thought he was just joking.
Even now when don't talk that much, he tries to do things to get my attention and I don't know what to think of this as. He says we're friends but he never acts like friends when he's around me. He acts like he's my boyfriend. What's he even thinking? I'm really confused.
Whats he thinking?
Post Opinion