I think a flat call on the flop is the way to go with this hand. With your reraise preflop (which I dont really think is the greatest idea), villain knows you have some kind of a hand. He is not leading out here with nothing (ie: high cards). Thus he either:

1.) has a set and is betting into you, thinking you have a big pair and hoping you'll reraise him right there
2.) has a pair, over or on the board, and is trying to figure out if you have high cards

i think flat calling here saves you money when behind and doesnt really risk giving a free card that can hurt you if you're ahead, since it's likely villain isn't in there betting with overcards. you have position, see what card comes on the turn and how villain acts. make your decision there.