Hi Eliogabalo
I believe many of us here feel like you. But behaving differently because never got a ladyboy girlfriend. I am bi-sexual I suck the cock of my boyfriend and enjoy ass pounding but I am not fully satisfied because he is not a sweet girl. I also enjoy the company of my girl friend but not fully satisfied as she does not have a dick.
Unfortunately I never had ladyboy girlfriend. You have realised your dream and not guilty about it. To me you are straight neither gay nor bisexual.
Enjoy