2/4NL: Jacks are good?

[setjes]

Villain seems pretty solid. 3bets a decent amount, but this is the first time I see him 4bet. I've 3bet (not too often imo) and called his pfr a couple of times before. The times I 3bet him pfr he folded. It's pretty early in the match, but he stacked off to me a couple hands before. In a reraised pot he shoved over my turn raise with a fd and he missed. Should I see this 4bet in this situation most of the time as strenght, cuz I shouldn't believe him after the bluff he made a couple of hands before and he knows that, or as weakness (tilt)?

FullTiltPoker Game #3861717542: Table Jobe (heads up) - $2/$4 - No Limit Hold'em - 10:02:03 ET - 2007/10/15
Seat 1: Hero($909)
Seat 2: erusugen ($396)
erusugen posts the small blind of $2
Hero posts the big blind of $4
The button is in seat #2
*** HOLE CARDS ***
Dealt to Hero [Jd Jc]
erusugen raises to $12
Hero raises to $36
erusugen has 15 seconds left to act
erusugen has requested TIME
erusugen raises to $108
Hero...

Oh and if u think this is an easy fold or easy call, please tell me what u think is borderline