so, i have maybe 15 hands on opponent, he just sat down. i have seen him bet/raise on the turn and river a couple times without showing down.

is there any other way to play this? do you call the river? do you check the river? do you bet more on the river, or do you bet the turn?

Holdem No Limit $0.10/$0.20

[Jan 21 02:12:44] : Seat 1 : texas_king has $4.96
[Jan 21 02:12:44] : Seat 2 : nerves77 has $45.59
[Jan 21 02:12:44] : Seat 3 : STEVIEC1888 has $35.14
[Jan 21 02:12:44] : Seat 4 : Jjoejoe2 has $4.88
[Jan 21 02:12:44] : Seat 5 : wind_jammer has $23.04
[Jan 21 02:12:44] : wind_jammer is the dealer.

[Jan 21 02:12:45] : Seat 2 : nerves77 has
[Jan 21 02:12:49] : STEVIEC1888 called $0.20
[Jan 21 02:12:50] : Jjoejoe2 folded.
[Jan 21 02:12:52] : wind_jammer called $0.20
[Jan 21 02:12:53] : texas_king called $0.10
[Jan 21 02:12:59] : nerves77 raised $1
[Jan 21 02:13:02] : STEVIEC1888 called $1
[Jan 21 02:13:05] : wind_jammer folded.
[Jan 21 02:13:08] : texas_king called $1

[Jan 21 02:13:08] : Board cards
[Jan 21 02:13:12] : texas_king checked.
[Jan 21 02:13:20] : nerves77 bet $3
[Jan 21 02:13:21] : STEVIEC1888 called $3
[Jan 21 02:13:23] : texas_king folded.

[Jan 21 02:13:24] : Board cards
[Jan 21 02:13:26] : nerves77 checked.
[Jan 21 02:13:28] : STEVIEC1888 checked.

[Jan 21 02:13:29] : Board cards
[Jan 21 02:13:34] : nerves77 bet $4
[Jan 21 02:13:41] : STEVIEC1888 called $4 and raised $10
[Jan 21 02:13:43] : nerves77 called $10

To me it usually depends on timing of the flop call, if they call quickly its more likely to be a flush draw because they don't even have to think about it, all they see is "I have a flush draw, obviously I'm calling". So if the Opponent calls quickly on the flop then I probly check the turn a lot of the time like you did and hope they check behind so I can see a free shot at the FH on the river. But once you get there after the check/check turn flush card and you're OOP, I probly check and call most bets on the river. If the opponent didn't instacall the flop, I'm definately going to bet the turn again and see how things go from there.