#okproblems

“lol” is not a punctuation mark.  If I say “Hello” in response to your “Hi,” responding “Sup? lol” DOESN’T MAKE ANY SENSE.  
Why are you laughing?  Was my “Hello” response amusing to you?  Did you really laugh out loud?  Did you actually find something in my response that would ever make anyone laugh ever? No.  You didn’t.  So now you'e begun our exchange by lying to meeeeee.  Don’t do that.

That is all.