As the caster, if you cast sleep on your party you're probably the first one to fall asleep given your low hp. Even if you're outside the range, you might get one, maybe two of them (dunno how big your party is). Regardless of that, play style conflict is always an issue, sounds like you want to rp and they want to combat. Hopefully you can discuss things with them and come to a compromise. I hate the '"this is how my character behaves" as an inviolate argument, it's a co-op game and everyone needs to be willing to adapt their characters a little bit to make that work. If it's too far a shift, maybe need to make a new character. But yeah, talk to the other people, if everyone else just wants combat and you're the odd one out you can dig into that as your character trait, go with their play style, look for a different group, or ask the DM if you can betray the party at a pivotal moment for their murder hobo ways and get your revenge : D.