How bad is this online fold?

[glen]

Stars 30-60, 6 handed. . .

I have JJ in the bb. UTG raise, sb coldcalls, I call.

flop T 7 5 two hearts. sb checks, I bet, UTG raises, sb coldcalls, I 3 bet. utg and sb call.

Turn 6 no heart. sb checks, I bet, utg raises, sb cold calls, I fold. . .

I ask because I thought it was a marginal situation, yet I felt folding was better than paying two more big bets with a potentially dicey river to deal with in light of the sb's presence, but Paluka said he wouldn't even consider it.

Also, I didn't really have a read on utg's play, as I had only played against him/her for about 20 minutes and didn't see anything out of the ordinary.