I'm not a pantser, but if you are, here's a tip from an extreme outliner to help you figure out how to end your story. (By the way, my favorite ending type is 3. 1 is too linear, and the kind of thing I wrote when I was 10. I can do way better than that. 2 is sad, and I hate sad endings. 3 is just right.)
Okay, here's your basic plot with your three basic options for ending a story: character wants something. Character encounters obstacles to achieving goal. Obstacles, obstacles, obstacles. Conflict comes to a peak.
Now your ending options:
1) Character overcomes obstacles and gets what they want.
2) Obstacles prove to be too overwhelming. Character either gives up, accepting the status quo, or dies.
3) Character gives up original goal after discovering something else matters more to them. Character gets new goal, and very often the original goal also comes to the character as a side effect of switching goals.
Hope this helps.
