[BigAlK]

I agree with Alewis' assesment on the flop/turn, but that's because that's how I would play it. Your response has me considering the possibility that your way is better although I agree with Alewis that in no way does this look to me like you picked up a flush draw. I also think his range could potentially include heart overs although only KQ seems likely given the river card. (This could be expanded depending on buy-in and reads on villian.)

In any case if your goal here is to get the most money in on the assumption that your hand is best (something I seriously doubt is the case) then a weak lead might induce a bluff raise (if he interprets your bet as weak). The all-in might look like a bluff, but I doubt he calls with anything weak enough for you to beat.