Okay, here's my experience.
I haven't transitioned and as of now, don't plan on transitioning. I'm in my late 30s.
It takes a lot of mental effort to keep the dysphoria under control, it's very tiring and it interferes with most aspects in your life.
I am happy (mostly), I identify as a heterosexual, but am happily married, monogamous and mostly satisfied in my sexual life. It will depend on your partner and who you are though.
Sometimes I get sad thinking of what might have been and role playing where I would be in my life had I decided to transition.
If you're as far ahead where you are in your transition process and still doubtful of the surgery, then, maybe there“s no harm in waiting it out for a few years (if you can mentally handle this, there might be another sort of innovative procedure for transgendered people in the future).
Anyhow, I've said it once and I'll say it again, there is no one true path or solution on how to live your life. You do what must be done under the circumstances you're living,