TD2-7 with an erratic player: stand pat or draw?

[MarkGritter]

Villian is extremely erratic. Twice he's gone multiple bets in the first round, drawn 3, and then made a 7. He's shown down pairs and ace-high hands.

Villian raises from the button. I have 2445x in the BB and call. I draw 2. Villian draws 5! I get J3 the first round and bet. Villian calls.

Stand pat or draw here?

I drew and bricked the next two draws (a 4 and a 3) while Villian drew 4 and then 3. But I won anyway.

(Villian later did me the courtesy of going 4 bets on each of the first two rounds while I had a pat 875.)