Again... I need to be able to get away from this...

Full Tilt Poker $0.10/$0.25 No Limit Hold'em - 8 players -
http://www.thehandconverter.com/
The Official DeucesCracked.com Hand History Converter

BB: $25.32
UTG: $25.00
UTG+1: $25.00
MP1: $27.97
MP2: $3.83
CO: $25.00
BTN: $52.65
Hero (SB): $31.45

Pre Flop: ($0.35) Hero is SB with 5s Qs
UTG calls $0.25, 1 fold, MP1 calls $0.25, MP2 calls $0.25, 1 fold, BTN calls $0.25, Hero calls $0.15, BB checks

Flop: ($1.50) 5h Qc 7h (6 players)
Hero checks, BB checks, UTG checks, MP1 checks, MP2 checks, BTN bets $1, Hero raises to $3, BB calls $3, UTG folds, MP1 folds, MP2 folds, BTN folds

Turn: ($8.50) 6c (2 players)
Hero bets $4, BB calls $4

River: ($16.50) 4h (2 players)
Hero checks, BB bets $10, Hero calls $10
For whatever reason, I have had a tough time getting away from this. What am I putting the BB on? He's called a flop check / raise for pot. He's called a slowed-down turn half pot bet, and now he's betting the river on a completed 3-flush board. What are the hands out of the BB that are calling down and betting the river that I'm beating? Any 8 or 3 will beat me, as well as any 2 heart combo. I need to be dropping this hand.

Final Pot: $36.50
BB shows Kh 9h (a flush, King high)
Hero mucks 5s Qs
BB wins $34.68
(Rake: $1.82)
I really need to stop leaking chips when I'm put to a decision like this. I *NEED* to be able to walk away from the $16.50 pot when I'm beat. The problem that's screwing with my head is for every bet of this type, I'm getting bluffs like this:

Full Tilt Poker $0.05/$0.10 Pot Limit Hold'em - 7 players - http://www.thehandconverter.com/hands/206431
The Official DeucesCracked.com Hand History Converter

UTG+1: $9.47
MP: $5.93
CO: $9.95
BTN: $4.88
SB: $7.95
BB: $19.60
Hero (UTG): $10.39

Pre Flop: ($0.15) Hero is UTG with 8s 8h
Hero calls $0.10, 1 fold, MP calls $0.10, 1 fold, BTN calls $0.10, 1 fold, BB checks

Flop: ($0.45) 8d Kh 5d (4 players)
BB bets $0.45, Hero calls $0.45, MP calls $0.45, BTN folds
I got greedy and smoothed the flop pot bet, hoping the MP would raise.

Turn: ($1.80) 9d (3 players)
BB bets $0.90, Hero calls $0.90, MP calls $0.90
Real bad card here. 9d completes the 3-flush board. I'm in call down mode.

River: ($4.50) 4s (3 players)
BB checks, Hero checks, MP bets $4.48 all in, BB folds, Hero calls $4.48
Should I be laying this down? Like the hand above, MP has checked / called all the way through this hand. Now he's pushing on the river for essentially pot. What am I beating? Well - BB folding helps narrow my chances, because I don't put MP on some squirrelly combo like T7 or 76 (although in retrospect, my middle calls gave him correct odds to call). I'm beating all pair / two pair combos. I'm not beating any flushes though. Whatever, I call.

Final Pot: $13.46
MP shows Qs Kc (a pair of Kings)
I'm pretty sure that this guy thought his Kings were good regardless of the call. He thought he was slow playing KQo.
Hero shows 8s 8h (three of a kind, Eights)
Hero wins $12.57
(Rake: $0.89)

Is anyone else having problems like this where you're forced to lay down to a large river suckout bet? I don't know why, but I just can't seem to find the FOLD button *EVER* in situations such as the above - perhaps I'm not wrong here... But the first hand cost me an additional $10 "just to see." Any ideas?