hand 1 i push him in, especially for that stack size. that probably isn't the best way to look at it, but probably my play.

hand2: hard to not go broke here if he makes his flush on your top set. is it possible he's making that reraise there w/ a set of his own? his large stack size is going to make pushing against you there out of the question if he does, and i would expect a raise like that from a flopped set by a good LAG to play. another possibility on his flop bet is that he is trying to control pot size w/ A or K of diamonds, but when that Ad comes out, this makes this much more unlikely.

i guess all things considered, if i'm really worried about the flush there, i try for a cheap showdown and probably check/call the turn and then try a blocking bet to lead out the river. since you're OOP, that is the only weapon you have left. but if the board pairs, which it will often enough, you're golden.