Does the guy I work with like me or not?!?

So, this guy I work with asks me if I'm going out every weekend, he's even jokingly said we should leave work and just go hang out. He's also said I should transfer to his school ( he lives in Memphis, but he's down here visiting his brother for the summer.) My friend wants me to ask him out and I have asked him to hang out, just not alone. I invited him to go out for my friends birthday and he's going. I'm just confused! :S It's driving me nuts not knowing if he likes me or not! Help!