It COULD be a fold, but you're getting a decent price and his range to get to the river there is really really wide (many other hands than flushes). I think you'll see an overplayed JT from time to time here or the occasional bluff.

I actually like that you're trying to fold in spots like this. It's good exercise because eventually when you get to stakes where you have to play thousands of hands with the same people, you'll be able to put them on such narrow ranges and make big folds from time to time.