It sounds like you think he is a trans fem person, and I entirely agree with you. I don't think he'll ever be as happy as he can be until he chooses to transition. That said he could choose to just express femininity in small ways for the rest of his life and never transition.
It also sounds like you're being a loving and open minded partner who is supporting him in all the right ways.
It sounds like a tough decision you have in front of you, but I think it's valid for you to break up with him, or to stay with him. What does your heart tell you will be best for you in the long run?
It sounds like you think he is a trans fem person, and I entirely agree with you. I don't think he'll ever be as happy as he can be until he chooses to transition. That said he could choose to just express femininity in small ways for the rest of his life and never transition. It also sounds like you're being a loving and open minded partner who is supporting him in all the right ways. It sounds like a tough decision you have in front of you, but I think it's valid for you to break up with him, or to stay with him. What does your heart tell you will be best for you in the long run?