Boyfriend dealing with gender identity

My boyfriend who i love has recently told me that he is struggling with his gender identity. Ive always known he was more feminine and it was cool with me. But the whole trans spectrum scares me. Im not transphobic at all and am definitely an LGBTQ+ ally but its different when i friend comes out to you than your significant other. He still wants to be with me no matter what. And i want to be there for him as well no matter what he ends up identifying as. Im just scared. That i might lose him. That i might not be enough. Its going to be hard for me because i can only handle so much as a girl. I signed up to date a guy and to have a boyfriend. The thought of having a girlfriend is scary just because i never have before. Im secretely hoping he ends up being more nonbinary than a trans women. Its so selfish of me i know. Its just it would be easier. But i know that no matter what they will still be the same person I fell in love with. Ive been crying a lot because of how scared I am for our future. I just want things to work out for both of us.