Missed a draw and fired; Am I in a dark tunnel?

[KneeCo]

Second hour 20+2 DeepStack.

Villain is a pretty solid player post-flop who limps into too many pots. I'm playing about 20% of hands myself, but have only shown down solid hands and haven't been caught getting out of line. Me and the villain haven't butted heads HU until this point.


PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) converter

MP2 (t12525)
MP3 (t7420)
CO (t4830)
Button (t14555)
SB (t5434)
Hero (t12390)
UTG (t3452)
UTG+1 (t4050)
MP1 (t4510)

Preflop: Hero is BB with 8[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, CO calls t100, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (t300) T[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets t300</font>, <font color="#CC3333">CO raises to t600</font>, SB folds, Hero calls t300.

Turn: (t1500) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets t400</font>, Hero calls t400.

River: (t2300) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t1500</font>

His turn bet was weak, perhaps content with the chance to chase my straight, I made a mistake by not raising him right there.

Nevertheless, with a T or a K I think he bets more so I guessed he either had a busted flush or a mid-pp and fired at the river.

I never feel comfortable pulling this kind of bluff because bluffing at the river OOP when I missed a draw was a big leak of mine back when I was a (passive?) newb and it still feels like desperation chip spewing sometimes.