10 NL Fighting a maniac deep, facing river push

[crovax4444]

I'm playing a very nitty game, but I'm also very agressive. The maniac has been on the table for about 40 hands, and whenever we have tangoed, (I c-bet) he raises, I fold. Happened at least twice now. Then comes along this gem.

Full Tilt Poker - No Limit Hold'em Cash Game - $0.05/$0.10 Blinds - 4 Players - (LegoPoker Hand History Converter)

Hero (SB): $16.20
BB: $15.90
UTG: $21.60
BTN: $7.60

Preflop: Hero is dealt 7 7[img]/images/graemlins/spade.gif[/img] (4 Players)
UTG calls $0.10, BTN folds, <font color="red">Hero raises to $0.50</font>, BB folds, UTG calls $0.40

Standard

Flop: ($1.10) 2 9 9[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">UTG bets $1.10</font>, Hero calls $1.10

I figure I quite possibly have the best hand here, but I want to go for pot control, so c/c

Turn: ($3.30) 6[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">UTG bets $3.30</font>, Hero calls $3.30

Repeating the thoughts on the flop

River: ($9.90) 6 (2 Players)
Hero checks, <font color="red">UTG bets all-in for $16.70</font>, Hero...

This is a great river card. Villain might now think his A is good. He might have a legit hand. He might have anything. Villain pushes for 1.5x pot here and I'm lost

Crovax