[gregorio]

It is very unlikey you could stack him unless you get it all in preflop, because he can't like his hand very much if he is folding to your $1 raise into a $9.35 pot. Based on your bet sizing on flop and turn, you need to fix a lot of basic leaks before moving up to NL50. But I think there is not much chance you can stack him in this hand if he isn't even willing to call your river raise.