10 seater $20 sit and go on ladbrokes
5 people left. Im first to act and have around 1300 chips left. Blinds are 50/100
im dealt

Raise to 350
button (loose, agressive & chip leader) calls
big blind goes all in
its only 200 more or so to call
I decided to call rather than move all in because i was almost certain the small blind would call my all in
flop

, blank, blank
im first to act, and have 800 left. I decide that if i bet the flop im pretty much pot commited.
I check, he checks
turn
blank
again i check, he checks
river

i feel i still need to check, and the button puts me all in
I fold and he show

the big blind had nothing and was out, so the button took the pot
i felt i played this hand really badly. any suggestions?