So, I know I'm attracted to guys (sexually and romantically) but I can't see myself in a serious relationship with one. Like, flings with them would be fine but having a husband would be kind of weird. Is that just a preference or should I not call myself bisexual? Also I'm attracted to, and would be in a relationship with, non-binary people.
You sound bi to me (you could also call yourself pan). Not wanting to be in a relationship with a guy is a preference, but doesn't determine orientation. You're attracted to more than one gender so you can ID as bi.