I think he likes me but I'm not sure how much. He invite me to his birthday gathering tomorrow night which is really last minute. I texted him and told him I wouldn't be able to make it because it's really short notice. But I wish him an early Happy Birthday with a kiss smiley. He took a while to reply back and said a short Thanks (my name). I wonder if he's upset that I'm not going. I mean I know nobody really knows except for him but if it was you, would you be upset your crush couldn't make it to your birthday?