Bad Guy? (SPOILERS)

Rating: Null/10 (24 August 2004)

I was just wondering...was Lenny partially a bad guy?
I mean after he killed that drug guy and was sitting in his truck writing 'Don't believe his lies' on the back of Teddy's picture, he was saying things in his head like: 'Do I lie to myself to make me feel better? In your case Teddy, I will.' as well as: 'You're a John G. so you could be MY John G.'
I am just curious if he could be sort of a bad guy in a way. Since this basically means that he is gonna kill Joe Pantaliano's character when he doesn't deserve to die.