Mixing up your play from time to time is good, and I don't mind how you played this hand. First of all, a lot of players float that flop because it's unlikely to hit you (which is true ). So firing a 2nd barrel isn't horrible. I would be tempted to fire a river bluff, but if he had a draw, you're probably good, and if he has a pair on the board, he's probably not folding it at this point. My last thought is that villain has a small PP here (55 or 77?) and firing a sexy bet on the river would be awesome. But meh...risky.

If villain had donked into you on the river, the hand would've gotten really interesting.

Anyway don't be so hard on yourself, I think this is far from spewage.