Of course, he'd think about Boober. They are best friends! Whether this boyfriend thing works out or not, that is something that had already been established. Why be best friends if you aren't going to look out for them?

"Okay, then I'll join your adventuring party-- clan. I'd-- I'm already in the Bad Kids, so if they'd all show up, we'd have to sort that out but like, if they all show up here, it's definitely to break us all out, so it wouldn't really be an issue, I think."

Riz has always been so focused on getting home that he has never stopped to think what that would mean in terms of losing Mando and Boober. Maybe he should be bright enough to remember that is going to be part and parcel of it. Or maybe his brain is already shielding himself from that potential loss by just not thinking about it.