First time playing poker live with these guys. Don't know what there styles are.. None seem to be too maniacle though. Villian seems to be solid (well at least I think so), not bluffing too much not a loose maniac style it looks like.

Villain($65)
MP2 (Fold)
MP3 (Fold)
Hero ($43)
Button (Fold)
SB (Fold)
BB (Fold)
UTG (Fold)

Preflop: Hero is CO with
SB posts a blind of $1. BB posts a blind of $2.
1 fold,Villian raises to $5, 2 folds, Hero calls, 3 folds.

Flop: ($13) (2 players)
Villian bets $15. Hero?

I put him on one of three types of hands.
Mostlikely was a high pocket pair (not aces) something in the Q to T range. Second was possibley AKo. Third was maybe a JTs of diamonds or something like that, but that was a very unlikely posibility. What would/do you do when this happens?