I was down 2.5 BI but kept my cool. CO and I had been involved in a couple of hands already and he was playing TAG.

$0.05/$0.1 No Limit Holdem
6 players
Converted at

Stacks:
Hero ($11.65)
UTG 1 ($9.85)
CO ($11.35)
BTN ($9.00)
SB ($3.80)
BB ($8.85)

Pre-flop: ($0.15, 6 players) Hero is UTG [Js]
Hero calls $0.1, 1 fold, CO calls $0.1, 1 fold, SB calls $0.05, BB checks

Flop: [8s][9s] ($0.4, 4 players)
SB checks, BB checks, Hero bets $0.4, CO raises to $1.3, SB folds, BB folds, Hero raises to $3.7, CO goes all-in $11.25, Hero calls $7.55

Was I too aggressive or did I make a donk call?

perfect.

raise or fold pre though

I see no problem with limping this UTG in a passive game

its bad. just get in the habit of not limping like that because as u move up people will make u pay.

i mean limping behind other limpers in the co or otb isnt terrible imo but utg ew.