Books about healthy relationships that don’t focus on heteronormative relationship dynamics

I’m looking for books about healthy romantic relationships, preparing for healthy relationships, attachment styles, codependency, etc. I’m single and in my late 20s, and getting back into dating after only ever being in toxic relationships.
I am a lesbian so I would prefer books that don’t focus on traditional gender roles and heteronormative relationship dynamics. They don’t have to specifically focus on LGBTQ+ relationships, though that would be a plus