Villain is running at 42/21

I've been at the table for only 15 hands, and have raised only 3 times PF, and already, villain has 3-bet me twice.

The first time, I 4-bet him with AJs (Oops) and he called. Flop was King high. he checked flop, and I checked behind (I know. REALLY weak). I folded to his turn bet.

This time, I decide not to 4-bet PF (Mistake maybe??)

Push flop? Or raise smaller than a push here?

--------------------------------

SB: $263.95
BB: $401.40
UTG: $31.40
MP: $88.70
CO: $50.70
Hero (BTN): $113.25

Preflop: Hero is dealt (6 Players)
UTG calls $1.00, MP calls $1.00, CO folds, Hero raises to $5.50, SB folds, BB raises to $13.00, 2 folds, Hero calls $7.50

Flop: ($28.50) (2 Players)
BB bets $18.00, Hero ???????


Thanks!

If his reraise was bigger, I wouldve shoves all in. The smaller reraise scares me and I would just call like you did.

Horrible flop. Let it go.

I have no idea what the has to do with anything.