Trans Boyfriend?

Sara

I’m sixteen, my boyfriend is eighteen, we’ve been together for 6 months and my only other relationship was with a girl, it lasted like 8 months. My boyfriend is kinda fat, like overweight (a solid 100 pounds heavier than me) and i mind but like that’s not the point of this post. He’s been trying to lose weight and late one night i asked him why he wanted to lose weight and he said that it was because he wanted to transition from a guy to a girl. This like kinda bothered me but the next morning he just kinda brushed it off like he was tired and didn’t know what he was talking about.

Yesterday he asked me if i would still love him if he was a girl and i said yes but honestly i don’t think i would. I don’t know if it’s blatant transphobia or just a preference. I like girls and dated a girl before him so the issue can’t be that i don’t like girls but i just don’t like the idea of him as a girl if that makes sense.

Advice? What do i do? and how do i talk to him about it?