You'd heard a lot about Frenchie from Butcher. How smart he was, how resourceful, strong, etc. About how he'd be even better if he'd quit using drugs.

You were on thin ice with Butcher due to your status as a supe, your friend Hughie being the only reason the Brit hadn't shot you point-blank. So you weren't surprised when the rest of The Boys, Frenchie and Mother's Milk, didn't like you either. Frenchie especially, because unlike MM, he didn't like Butcher, either.

You just wanted him to like you.