[amulet]

you need to reraise here. there are several reasons.
you want to see if he reraises.
you don't want to let others in behind you, you already have 2 opponents, you don't want others to join, and if you do not reraise it becomes more attractive for those still to act.
you want to be last to act.
if he is tricky he might call you flat with AA or KK, and then you need to play some poker. however, if you put in a decent raise, he will often reraise or fold. if you can get an idea of where you are, lose MP1, and buy position if the others still to act fold, then you have accomplished a lot.