It's a long story that I won't tell in detail, but the gist is that I'm in a heterosexual relationship that I got into when I was really quite young, for not-very-good reasons, having earlier considered myself to be probably a lesbian. So I've thought of myself as bisexual for the past nearly twenty years. I love DP as a good friend, and he adores and fancies me, but I've never actually found him sexually attractive.
My "ah shit" moment was after a counselling session where we were discussing me possibly leaving my partner, when I thought more deeply about my statement to the counsellor, "I'm not gay, I just don't fancy men or want to be in a relationship with one or want their penises in me or near me".
The thing is, I do love him, if not romantically or sexually, and although we're not married and have no children, both our lives would be turned upside down by my leaving — I'm disabled and rely on him for quite a lot, both practically and financially, and he'd be absolutely devastated. And for personal and health reasons, I'm unlikely to find another relationship, so my sexuality is essentially theoretical. It may be best all round to just continue as I am.
So ignoring the fact that if I am, it's not something I can really do anything to change, AIBU to really, really not want to be a lesbian?