why do I always end up in these spots?

[Some9]

Villain is winning TAG, like 23/12/2
He plays his A game but also knows how to float people.

All comments appreciated.
No Limit Hold'em Cash Game - $.5/$1 Blinds - 5 Players -

SB: $100.00
BB: $100.00
UTG: $100.00
CO: $100.00
Hero(BTN): $100.20

Preflop: Hero is dealt K[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (5 Players)
2 folds, <font color="red">Hero raises to $3.50</font>, SB folds, BB calls $2.50

Flop: ($7.5) T[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $5.00</font>, <font color="red">BB raises to $15.00</font>, Hero calls $10.00

Turn: ($37.5) 8[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">BB bets $20.00</font>, Hero ???