figuring this out

so i started dating this girl when we were both 18 and yeah it wasnt really anything serious or anything but it ended up going on for a few years. she was always into this idea of me being her dom or something and i was never really into that kind of stuff before so it was new to me too. didnt want to tell her about the transition thing though cus i thought she would freak out and i just wanted someone in my life you know? but as time went on, more things started changing and i felt like it wasnt fair to keep hiding this from her. finally after a while i told her everything and we had a huge fight. she said i wasnt the same person anymore and i could see why. so its been a year since then and im still figuring out how to be who i am now in my relationships and stuff. not sure if this is even something people talk about or understand but it feels good getting this off my chest