Astarion might feel the trepidation that comes with it, but it's a complicated sort of hesitance: as much about himself and who he wants to be as telling Astarion.

[...jealousy is... weird.

I'm jealous of Yellow. I told everyone how to help him, because I know, and I know that he's an inmate and he's trapped here but sometimes I get angry that he has me to understand him when I didn't get someone like that and I had to figure it out all by myself.

...still am figuring it out by myself a lot of the time.

I want to help him and I feel like I should be glad there's someone like me finally, but I'm also angry that he has someone to help him, but I'm still going to help him, but it doesn't feel fair. ]