Nut flush river decision

Had just sat down at this table, no read on anyone.

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.25./$0.50.
5 players
Converter

Stack sizes:
UTG: $120.50
CO: $31.95
Button: $37.65
Hero: $27.90
BB: $18.25

Pre-flop: (5 players) Hero is SB with
UTG calls, 2 folds, Hero calls, BB checks.

Flop: ($1.5, 3 players)
Hero bets $1, BB folds, UTG calls.

Turn: ($3.5, 2 players)
Hero bets $2, UTG calls.

River: ($7.5, 2 players)
Hero checks, UTG bets $4.5,
Hero ?

Basically, call or raise?

Totally read dependent. He could be on anything from a bluff to a boat.

This is tough. Normally with the nut flush, you could either check with the plan to c/r, or else bet--usually the latter. As always, if you plan to call a sizable bet, bet yourself and try to get value. With a paired board, I don't check/raise here, because there arent many hands that call a sizable c/r that you beat.

Personally, I think you got yourself in a tough position by checking, as you basically locked yourself into calling a reasonable bet here to fend off the bluff. Next time definitely bet out 1/2 the pot and try to get a call. If he raises something sizable, that's an easier laydown under most circumstances.

All things considered, I call here.

buy in full, lead the river, call most raises.

in your exact shoes here i raise to like 13 and call if he puts you all in.

I raised up to $10, dude pushed, and I called. He had a boat.

I post this because I've recently concluded that a leak in my game is not maximizing profit on the river. Then I make what is basically my first play designed to fix the leak, and I get stacked, making me wonder if I'm falling into a new leak or if this was just a bad beat. But I'll lead out next time, thanks.

Follow up question - had I led out with $5 or so, dude would have raised, possibly all in. Can you guys actually lay down the flush here? To a raise of $10? Probably not...but what about to a push? Where is your breaking point, if there is one? I've got no read on the guy - this was like the 10th hand.

I bet river and fold to a sizable raise.Minraise I call(I had a similar hand on Wed where I lost on the river ut luckily dude only minraised me as I woulda laid down to a push).