100NL - I have aces in a 2.5b pot but he's a nit

[ciro bonano]

Carlos Poker 0.50/1.00, hand converted by the iPoker Converter at Talking-Poker

saw flop | <font color="#C00000">saw showdown</font>

Button ($56.65)
SB ($106.20)
BB <font color="#C00000">BB ($100.00)</font>
UTG UTG ($67.37)
UTG+1 <font color="#C00000">Hero ($98.50)</font>

Preflop: Hero is UTG+1 with A [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/heart.gif[/img]
UTG raises to 2.00, Hero raises to 7.50, 2 folds, BB calls 6.50, UTG calls 5.50.

Flop (23.00) 7 [img]/images/graemlins/club.gif[/img] 2 [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/heart.gif[/img]
BB checks, UTG checks, Hero bets 17.00, BB moves all-in for 92.50, 1 fold, Hero... ($74 to call)

Villain (BB) is 16/12/5, I'm running 24/21.

I don't think he's calling preflop with 89 or some random Axs, but it could be JJ+.