I don't think the preflop play is too bad, if $15 is a standard raise at that level. Bluffing preflop from early position with aware opponents can work.

I would have folded to the enormous reraise, though. The board is paired and he could have a higher flush. He called your preflop raise, usually meaning he has a small pocket pair or suited connectors.

Drawing to a flush with a paired board is a shaky proposition in my mind. I don't like paying to draw dead. (Or I guess in your case, to a 1 outer for a straight flush.)