The guy I'm with (not exactly my boyfriend, because he didn't ask and it's a long story) knows and it's okay with that, but I'm okay with the fact he likes ecchi (even if I don't). Respect is necessary in every aspect of a relationship. Your bf doesn't have to like or watch with you, but he has to repect, the same way you have to respect his tastes. But I believe that if your love is real and if you have to be together, your taste for anime won't make you two break up.
Sorry for my bad english.
*even I don't like it
Sorry, my bad.
Well, I don't have a boyfriend and I didn't understand if you are with someone but I'll give a advice about how I told my sister I was into yaoi. I started with a little shounen-ai, just CardCaptor Sakura and sports anime because they have some much subtle BL. Then one day, when we were watching the first season of Free!, she looked to me and said: "Haru and Rin hate each other so much that it must be love!", she was being ironic, but I got so happy my sister is a fujoshi. And we watch anime together, but not porn yaoi because it would be a little weird. But just go with little steps and maybe one day you two will talk about couples and stuff.
Does anyone want their partner to understand ur love towards yaoi? Awww i really want a guy who can see the real me who likes yaoi.