[Momo is, for better or worse, the kind who will dig his heels in if someone tries to blow him off in this situation unless he has actually overstepped. In this situation, he doesn't consider himself to have done so, so his own expression settles stubbornly, if not with actual irritation such that Sougo has. While he doesn't raise his voice because it's a library and he doesn't want to get kicked out, there's certainly more urgency in his tone that's not common for him.]

I'm not worried about being around you, I'm worried about you! I know how it feels to disregard yourself, but you can't expect everyone around you to do the same thing, especially when your life could be on the line. [The small self-aware part of Momo wonders if this is how other people feel dealing with him, but he's a bit too concerned in the moment to think about that for more than the split second it enters his head.] Let me get you out of the city and maybe we can find a familiar on the way. There's got to be people down here who can do the ceremony.

[Considering what a big deal Bonding is down here. He doesn't quite step over the line of suggesting a local Monster as a stopgap, since it takes his very closest relationships for Momo to start considering using people an option to protect them.]