150/300 flop play

[HOWMANY]

8 handed game. 2 limps including very weak player (same one from other hand), i limp A467 double sooted while telling mike l who is sweating me that i have no idea why i didn't fold, button comes along who is tight but not good.

Flop 36T putting a flush draw out there (not me) and a backdoor nutflush draw for me.

one of the blinds bets out fold to the weak player who raises, i 3bet

so basically the weak player never raises a naked a2 here, my hand has solid prospects against the two players showing an interest postflop and 3betting will get the tight button off any low draw without a high prospect i believe. mike told me later i should call. i told him i thought i could just fold but that raising is much better than calling. thoughts?