Trapped in a box

So for the longest time I'd told people and identified as Bi. I know for a fact that I love girls. In my head it's always "girls girls girls". And sure guys are attractive. Awesten Knight from the band Waterparks is attractive. Sebastian Stan is attractive. But Kristen Stewart? Hayley Williams? Wanda from the Avengers? Stomp on me thank you so much.

And every time I mention that I wanna identify as just lesbian my roommate/ex who is nonbiary says that I'm not. They always discourages me. And I wanna tell them that I was like 16 when I decided that and now I'm almost 23. Things can change. But I'm afraid that they'll tear me down. I don't have a super big support system. My mom knows I like women because I dated a girl in high school and my coworkers know I identify as a lesbian. My roommate has been a part of my life and they're opinion matters for some reason.