Being in a lesbian relationship doesn't automatically make me a lesbian

Before anyone says anything, there is a term "sapphic" but people around me barely use it.

Anyway, anytime me and my ex (both women) would talk about our relationship with others or others about us, they would refer to both of us as lesbians because we were in a lesbian relationship. I honestly think she forgot that I'm bi with a prefrence for women. She kind of never acknowledged that fact. But anyhow...

Now that we broke up, everyone is surprised that I'm interested in men. Honestly, I have never been with one in relationship nor slept with one and thought I never will (because the relationship lasted 2 years and I didn't see myself with anyone else), but me being bi is still a fact that people overlooked big time, now saying that they don't understand how I am not a lesbian.

Then there were people who said I am, in fact, lesbian, and just like the attention of men, which isn't right considering I explored that part of myself and saw I do like men, even if I prefer women.

Just something I wanted to point out and hear others what they think because sometimes it's frustrating to explain this to people who really don't get me.