Need some reason to consider 3bet here.
I like turn size
I think rvr block could be fine but id go for a smaller size, or just check fold

i think ur line is fine. i would probably go for 2/3 pot on the turn and c/f the river. Against an agressive stealer i would also consider 3betting pre, but flatting is cool, too... i think

I like your play throughout all streets, except for the river.

On such a 'completing-river' as it completes most draws(except flushes) we shouldn't bet our hand, no worse hand is ever calling us.

Now it comes down to what you perceive your opponent to do, you say you don't have a lot of stats, but how far from break are we? the closer to the break the more likely he could bluff, where is he from etc. etc. so checking on river for sure, and than deciding based on sizing, pot odds, and the answer to the previously mentioned questions: whether you will call or fold. as you don't have the A of hearts you don't block the most likely draw. which is a good thing.

thoughts ?