Call or fold?

Through the last posts I have written about poker when the tables were treating me good.
Now watch this hand:
PokerStars Game #10775389687: Hold'em No Limit ($0.25/$0.50) - 2007/07/04 - 23:55:39 (ET)
Table 'Selene II' 6-max Seat #4 is the button
Seat 1: fiskarinfo ($49.45 in chips)
Seat 2: maxyee ($51.60 in chips)
Seat 3: IanBarns ($55.05 in chips)
Seat 4: Thaisssa ($127.70 in chips)
Seat 5: BJLTNYK ($101.45 in chips)
Seat 6: TheJobisVito ($51.55 in chips)
BJLTNYK: posts small blind $0.25
TheJobisVito: posts big blind $0.50
*** HOLE CARDS ***
Dealt to fiskarinfo [Jc Jd]
fiskarinfo: raises $1.50 to $2
maxyee: folds
IanBarns: folds
Thaisssa: folds
BJLTNYK: raises $4.50 to $6.50
TheJobisVito: folds
fiskarinfo: raises $42.95 to $49.45 and is all-in
BJLTNYK: calls $42.95
*** FLOP *** [4h 3s 8s]
*** TURN *** [4h 3s 8s] [Js]
*** RIVER *** [4h 3s 8s Js] [9s]
*** SHOW DOWN ***
BJLTNYK: shows [Ah As] (a flush, Ace high)
fiskarinfo: shows [Jc Jd] (three of a kind, Jacks)
BJLTNYK collected $96.40 from pot
*** SUMMARY ***
Total pot $99.40 Rake $3
Board [4h 3s 8s Js 9s]
Seat 1: fiskarinfo showed [Jc Jd] and lost with three of a kind, Jacks
Seat 2: maxyee folded before Flop (didn't bet)
Seat 3: IanBarns folded before Flop (didn't bet)
Seat 4: Thaisssa (button) folded before Flop (didn't bet)
Seat 5: BJLTNYK (small blind) showed [Ah As] and won ($96.40) with a flush, Ace high
Seat 6: TheJobisVito (big blind) folded before Flop

Well there goes one buy inn.
Hope I´m not going to tilt. Surely this is why there is such a thing called Bankroll.
Playing on two tables, and have about 18 buyinns on 50nl.

Negative variance or just poor play?
Can´t fold JJ, although he did re-raise....