Preflop raise is mandatory with your hand. Any suited ABC hand must get as much money in the pot preflop as possible. If you miss your flush possibility there has to be enough bets in the pot to cover losing money getting quartered on the low. The flop is ok but not a likely scoop, unless runner runner straight comes and holds up. I probably would just call here unless I knew the players well and could get a worse low chasing. You're almost never going to drive out a flush draw and seldom the straight draw. The turn is awful for you, check/call is the proper play here. The river makes your hand and you're in middle position. Whether to bet or go for the check raise is debatable and dependent on the table. Can't determine how I'd play it without being there. Most likely I'd check/call here, figuring there is another A2 out there.

JMO - Knoll