i float possible tilty guy and hit, what's my river plan here

[WutRUTryin2Hit]

Pretty important to this hand is that about 2 or 3 hands earlier, I made a big move on a 3way flop where SB donked out, this guy (who had been preflop raiser) raised in MP, I put him on a okay-but-not-great hand and shoved with a draw (well, raised enough to clearly commit everyone's chips). He folded TP and has been chatting to me about the hand annoyedly and even during the preflop portion of the hand below he is telling me why it was a bad play or something. I don't think he's on irate tilt, but he's definitely annoyed, and I figure looking to play back at me. He seems like a decent player from his analysis of the previous hand, other than the part where he folded and is now educating a fish (me).

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

SB: $83.25
BB: $106
Hero (UTG): $125.65
MP: $51.75
CO: $98.50
BTN: $65.90

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $4</font>, 4 folds, BB calls $3

Flop: ($8.50) 4[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $5</font>, <font color="red">BB raises to $15</font>, Hero calls $10

Turn: ($38.50) K[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $21</font>, BB calls $21

River: ($80.50) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks

What's everyone's move on this river? I called the flop assuming he's probably playing back a lot of the time given his chat, then when he calls the turn I figure he actually has something. Effective stacks on river are about $60, a wee bit less than pot sized bet. Issues I face here are that my hand may or may not be face-up to some degree, or at least my hand strength, and obv. the main draw on flop hit.