At least, he's smitten with what she's doing for his indie-rock band City of the Sun!
Avi recently dished on his budding relationship with the Anger Management guest star, gushing:
"She's really awesome, and she's a lot of fun. I would definitely call her one of our biggest supporters."
So wait… is he basically just calling Lindz the best groupie ever?! HA!
In fact, we hear Avi hopped on Lindsay's hastily secured private jet and caught a ride with her to LA! Which just happens to be where City of the Sun recently played some gigs, one of which featured Lindsay locking lips with Avi in the audience.
Hmm, how convenient!
[Image via Splash News.]