<human>: Give me the gist of the text in a nutshell

So, I'm a freshman in college and there's this senior who I think is really cute. Of course, I stalked him over on facebook, found his profile and added him. He sent me and inbox saying that he was looking for me on facebook but didn't know my name. 
Here's where I kinda screw up, I was a bit shy and didn't know hot to respond so I said something among the lines of: hahaha, that's great, k bye. (okay, it wasn't that bad but it was something like that.) After that he kept on staring at me so much at college that all my friends were noticing, but he never talked to me. He liked absolutely everything I posted on facebook, but never talked to me. 
So one day there were this party of our course and I didn't go. He finally initiated contact over facebook asking me why I wasn't there, we talked for a little bit, conversation was going well when he abruptly answered me with a simple "haha" and that was it. 
After that, he kept on staring at me and liking all my stuff just like before. Then one day I was re-reading our conversation and accidentally sent him that huge thumbs up (fuck you messenger). I apologized and said a friend had gotten my phone and sent that to everybody. I really thought he would seize that as an opportunity to talk to me, but he just politely replied. 
BUT HE KEPT ON STARING AT ME ALL THE TIME. Now we're in a class together and I don't know what to do. I'm just really into him and seriously wanna get to know him. But I don't know if he's into me or how I should act. If it's me who should initiate contact. I know this is the epitome of drama, but I just think that out of all places you could give me the most honest and helpful answers.
<bot>: Have a crush on a senior who sometimes seems to reciprocate and other times seems to not give a crap. I'm kinda really into this guy and don't know how to proceed.