[chinaski101]

You played it well preflop/flop/turn. You have to raise turn once youve called the flop.
Which site was this on? This is something i usually take into consideration.

Vs a competent player i do think its a pretty easy fold, but since hes unknown makes it a little more difficult. He should only be showing up here with set/3 pair and a high flush draw to make the turn call.
However, since we dont know how he would play lower flushes/missed houses, etc a call isn't so bad. Im would also rule out the bare A, unless with a set. Not many people are going to call so much just to bluff the river when a diamond does appear. I also assume unknowns don't bluff the naked A.

Still think i just lean towards folding due to the instant push.