So I 24M and my girlfriend 23MTF have been dating for 2 years and it's been amazing she's been amazing she is sweet and caring and the funniest person in the world but when we started dating she was male and now she is female and I'm gay.

I originally thought I was bisexual but it turns out I'm not, I'm gay. For context she came out 4 months ago

I love her so much and I know she loves me so much too but I'm not attracted to her anymore. Don't get me wrong she is STUNNING but I'm not attracted to women, I've tried the whole 'sexuality can be fluid' but mind don't flow that way. I love her with all my heart I want to stay friends with her after we break up she's my best friend but I don't want to date her anymore I want her to be with someone who can fully love her with all their heart.

When she first came out I was super supportive and I will carry on to be but as she's started presenting more feminine my physical attraction towards her has died I've tried ignoring it but it isn't there anymore.

I know I'm going to hurt her and I'm terrified but I don't know when to break up with her.

Her birthday is on the 24th and she is expecting a message from the doctor that might determine whether she has cancer or not and we have set in stone plans for the future.

I don't think now's a good time to break things off but I can't keep leading her on.

Please anyone with advice please help