I'm at work but can't concentrate cause I'm thinking about him?

We talk on msn every day but today I decided not to talk to him first to see if he would msg me, and rather then hi he msged me saying nub (which is a payout) but we're always quite sarcastic with each other and this was like 15min after he signed in. Was he waiting for me to say hi?... is he interested.... sigh im stressing over this and really shouldn't be if you've read my other questions you'ld know i have a b/f and that this guy is just a crush and i can't decide if i want him to like me or not... i guess i just want to know cause it'll be one less thing for me to wonder about.