I have to disqualify myself on the poll. "Finding" is not my problem, "Keeping" is.
Much of my past life, the era in my 20's when I twice "experimented" with transition is a blur. I doubt that a life partner was on a priority list. Surviving, No, 1.
Humans are social creatures. We need that contact outside of ourselves to survive. I doubt I'd survive without my BFF, soul-mate and reality therapist. I know that is she left me, either by walking out or checking out; I'd be devastated, be self destructive, and .... Been there once before with an ex.
Being trans I've always been a very private person. To open up to ANYONE meant exposing yourself to hatred. Forget ridicule. Being a former fatty I can handle that. Fat jokes were nothing compared compared to the giggles, or worse, heard during my previous experiments with transition.
So, in a sense "having" a life partner is VERY important for me. This world is too grand of a place to experience it alone. One set of eyes is hardly enough.