If you haven’t already, start by communicating that you need more and different kinds of emotional support from your partner. They deserve a chance to develop this skill. If they’re not able or willing to meet your needs, you’re not a good fit. I learned this the hard way. But you deserve someone who can meet your emotional support needs.
As far as the other non-romantic relationships go, you don’t have to cut people off, but you should find other, more empathetic people to lean on. I have very close friends that I know will be there for me when I need emotional support. I also have other good friends who aren’t as good at it, and we get along just fine and bond over shared interests.
Allonormativity is what you’re talking about. Amatonormativity is the assumptions related to romantic attraction/relationships.
See Chen’s book Ace for a primer on asexuality https://www.angelachen.org/ace