When you get resistence with JJ preflop, do you go into "set it or forget it" mode?

Party Poker No-Limit Hold'em, $0.5 BB (9 handed)

SB ($8.25)
BB ($49.85)
UTG ($31.8)
UTG+1 ($48.75)
MP1 ($27.05)
MP2 ($55.65)
Hero ($50.6)
CO ($11.95)
Button ($139.49)

Preflop: Hero is MP3 with , .
4 folds, Hero raises to $2, 3 folds, BB raises to $4, Hero calls $2.

Flop: ($8.25) , , (2 players)
BB bets $7, Hero folds.

Final Pot: $15.25

Results in white below:
No showdown. BB wins $15.25.

This just felt of an overpair to my jacks. It could be 99, TT or AK but is this an easy fold against a non-maniac?

Yes. Easy fold.