Folding More Flushes

[ike]

Ok the converter is busted. I'm actually typing this one up, sorry about the ugly formatting.

Party 30, pretty loose passive for the 30
I have QsTs UTG, I limp, MP limps, SB completes, 4 to the flop for 1sb.
Flop:
Ks 7S 5h
checked to me, I bet, MP raises, SB 3 bets, I call, button calls.
Turn:
7c
sb bets, I call, button calls.
River:
Js
sb bets, I call, button raises, sb 3bets, I fold.

I'm curious about my play on every street (maybe not the turn, seems like a clear call). Is my limp ok? I've been doing this more recently and its felt fine. Does anyone cap the flop? Most importantly, I think this is a pretty routine fold on the river, and I used to think I paid off pretty liberally but I've been surprised by a lot of the river call discussion recently. Have I been folding the river way too much?