Does he like me?????????

He like, smiles at me in the hallway. And at lunch, he's always like hey, and I'm like hey, and then he gives me this cute smile. well anyways we were in p.e. and he saw me wheezing uncontrollably and he was like geez, I hope you don't die. if I wasn't wheezing I so would have asked him out. Should I ask him out? What will we do? I'm allergic to dairy and shellfish, would he care that we can't eat at Joes hack?