I have found in the past that any kind of sarcastic remarks suggest that any feelings he may have for you are not going to be anything worth your heartache. If someone has it in them to be sarcastic towards someone else who is obviously upset, with or without reason btw, then that person is not worth the bother. To some people, sarcasm seems to be funny, but in my book it's actually quite cruel. If there WAS a potential relationship here, and he had feelings for you, he wouldn't make these remarks. It could be the thin end of a wedge - I couldn't see love growing out of a tendency to be cruel.
Leave well alone!!