What does it mean,when guy says: "she's killing me"?

Anonymous
so this one guy,who showed signs of interests in me before, but barely approached me,looks intimidated by me. he spent like 15 min. staring at me when I was on my laptop in class,I glanced at him just once,then ignored him completely.

then,on his twitter he posted this :"made eye contact with this crazy girl. who will win? I hope I can survive..." and another one: "she's killing me".

What does it mean in this situaton ? and generally why would guy say this?

ps: once I accidently heard his friend say that I'm hot. but again,I have never been approached.
What does it mean,when guy says: "she's killing me"?
3 Opinion