Wow, so similar but yet so far.
My relationship was quite similar except I wasn't as pushy, more supportive, and cared more about her than the relationship or myself. I run myself into the ground actually, but it was totally worth it in the end. (yes not the best most healthy practice but I knew that, and made a choice)
The relationship you're in,
not worth it.
That's coming from someone who also used to thrive in conflict, FYI!
Say goodbye and try to learn some lessons, and try again in the future once you''ve done some personal growth.