I think I should've grown a pair on this non pair hand

MP2 is a total donk 62/0/.1 45 hands. I put him on 2 random cards.

CO has been playing weak tight 13/1/1 60 hands. I don't think he has a pair here.

My plan was to lead the flop and the turn until I got raised by the CO on the flop. When CO checked behind on the turn I put him on 2 big clubs and cursed at myself for not three betting the flop. Does anyone lead this river?

Party Poker 1/2 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img].
3 folds, MP2 calls, 1 fold, CO calls, 1 fold</font>, SB completes, Hero raises, MP2 calls, CO calls, SB calls.

Flop: (8 SB) 7[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img] (4 players)</font>
SB checks, Hero bets</font>, MP2 calls, CO raises</font>, SB folds, Hero calls, MP2 calls.

Turn: (7 BB) 3[img]/images/graemlins/heart.gif[/img] (3 players)</font>
Hero checks, MP2 checks, CO checks.

River: (7 BB) 3[img]/images/graemlins/diamond.gif[/img] (3 players)</font>
Hero checks, MP2 checks, CO bets</font>, Hero calls, MP2 folds.

Final Pot: 9 BB