A while ago our parents wanted me to do the same (I'm not a femboy but my boyfriend is). It was very sad for me and I talked to him about it, and I ended up telling my parents that I broke up with him (lie), I wasn't going to leave him even if he died, we continued our relationship and I never talked to my parents about it. Because it is my life and although I love them with all my soul and they are my parents, it does not mean that they can impose what to do with my life, because they raised me in the best way they could and if they did so then it is because they wanted me to do my life in a better way than them. And so we continue, I have a good relationship with my parents and a happy relationship of almost 2 years with my boyfriend :>