As a trans masculine non-binary person it's more of personal conversation. My partner isn't into masculine body types so my transition ended up being purely social because my partner does more on a daily basis to contribute to my happiness then the comfort of being in a body that doesn't make me feel like shit daily. It's a bit like having a pet allergy but deciding that you can live with feeling like someone poured sand into your sinuses every day rather than giving up your furry best friend. For all purposes though our relationship is coded and treated as though I am my specified gender. We are effectively culturally a same sex couple. Neither of us use female terms for my junk and he doesn't claim to be straight. We do joke he is "queer by association" however.
But what I am doing counts as a full transition.
In regards to the what you give up situation it's all rather dependant on how adverse you are and whether someone in your relationship is able to give a little and how much you value and ultimately how non-fungible the relationship is to you... Because - just putting it out there - strap-ons do exist.