I met a really nice guy Wednesday night and had a really good laugh with him while we were there. I had to leave early cause my friend was leaving and I wasn't having her walk home from the club by herself, and while he suggested swapping numbers, I couldn't remember mine, or find my friend to get it off her (my phone battery had died, so i couldn't even get his

) Anywho, I was in the pub today with my friends, who happen to know his flatmates, and I got this guy's number of them. I text him about 5 this afternoon and I've not had a reply. I saw him in the pub, but he was just leaving (after watching the rugby).
I'm pretty sure he liked me - his flatmate seemed happy enough to give me his number, and I doubt he would have done if he'd asked him not to.
(sorry this is all very long winded, but what do u expect at nearly 1am?)
I know there could be all sorts of reasons for him not to have replied, but I'm actually getting quite down about this. I can't get him out of my head and I physically couldn't sleep last night thinking about him. I really don't know what to do!!
Edit: I can't believe I'm obsessing over this... grrr... why do you fellas do this?????????