i dont know how to tell my bf i think im trans

long before i met my bf i was trans (ftm) for a couple of years, when i met him i started to feel like a woman again, wearing girl clothes, trying makeup, etc but its been some time since i started to feel like a guy again. when we first started dating (he didnt know i used to be trans) he told me that he wouldnt like me if a was a guy so im scared as to what his reaccion could be, also the other day we got into a fight cuz he saw an old text between me and a guy friend where i was joking with him calling him cute names (baby, love) the same way guys joke with eachother, and my bf got mad at me, so i told him that it was when i was trans and my friend saw me as a guy, my bf told me that it didnt matter cuz im a girl and my friend would see me as a girl too. so i also think my bf is transphobic. i really dont know what to do