Sure some people might stop watching but thinks of hundreds other who immediately marathon your whole series in a week or less!!!! Prime example: the 100.
Lesbians made a loyal fanbase. That is just a fact. Just asks Xena dan L words fan. The show has been over for decades. And the fandom is still there. Lurking and giggling and still gif-ing every damn frame of those show. I mean have you seen Xena? It’s one of those 90’s bad visual effect every episode. And we still rewatch it. I do it annualy myself.
I mean look at Swan Queen. Look at us. We were once at the point where every little thing in this show are purposed to cock-block our ship. And we still here and cherish every little eye-contact and flail when they as much as stand next to each other. They touched? We died.
Tl;dr: put more female x female relationship on your show you won’t be sorry.