New to the table, no read on the guy. Misplayed?

PokerStars Pot-Limit Omaha/8, $0.25 BB (9 handed)

MP2 ($25)
MP3 ($24.50)
Hero ($25)
Button ($39.20)
SB ($3.35)
BB ($24.40)
UTG ($33.10)
UTG+1 ($43.70)
MP1 ($28.35)

Preflop: Hero is CO with , , , . Hero posts a blind of $0.25.
3 folds, MP2 calls $0.25, MP3 calls $0.25, Hero (poster) raises to $1.35, 3 folds, MP2 calls $1.10, MP3 calls $1.10.

Flop: ($4.40) , , (3 players)
MP2 checks, MP3 checks, Hero bets $4.2, MP2 calls $4.20, MP3 folds.

Turn: ($12.80) (2 players)
MP2 bets $4, Hero calls $4.

River: ($20.80) (2 players)
MP2 bets $15.45 (All-In), Hero folds.

Final Pot: $36.25

He said after he was sweating on 2pair. Which means I had him.. but I can't see it.