tough situation. I can see A7 of hearts playing this hand this way after the flop(not likely though with preflop raise), more likely an over pair or AK or AQ of hearts (also possible is a set trying to make someone pay to play the flush draw). Either way you are behind, I would fold. If he has overpair, you are a major dog and if he has AK or AQ of hearts, he is ahead with 13 outs.

I agree this could be a donkey play with an AKo or AQo, but given your own reads, this is a fold.