Turn completed a lot od draws so i decided to check/call down. Is that okay? Or should i have bet/folded? As you can see the villain is pretty passive...

Villain is LP - 43/6/0.45 (after 110 hands)

Prima Poker skin
Limit Holdem Ring game
Limit: $1/$2
4 players


Pre-flop: (4 players) Hero is BB with
UTG folds, Button calls, SB calls, Hero raises, Button calls, SB calls.

Flop: (5SB, 3 players)
SB checks, Hero bets, Button raises, SB folds, Hero 3-bets, Button calls.

Turn: (5.5BB, 2 players)
Hero checks, Button bets, Hero calls.

River: (7.5BB, 2 players)
Hero checks, Button bets, Hero calls.

Results:
Final pot: 9.5BB

I like bet/fold the turn much more than the line you chose. You are drawing dead to a strt. With 4 on brd only a strt can raise.

If he only calls turn I think I fire the river again. He is not putting you on a strt here, so I think you can get called by hands you beat, but he raises the only thing you fear.

Against this opponent then maybe its true that he would only raise with hands that beat me! Against tough opponents though many will raise turn here with a pair to the board or an overpair for a free showdown. (knowing that i also fold hands better then his)

So it looks like we have reached a consensus.

Bet/fold against most LPs
Check/call against most TAGs

So this hand should have been a bet/fold! Villain had 55 for a flopped set