I do have an ending in mind.
My story starts with a wedding and I plan to end it with a wedding.
I also have a point where I can end the story a lot earlier in case I lose my motivation. A lot of plot threads will be unresolved but there should be a decent arc for my two protagonists.
Incidentally, that moment also revolves around a wedding.
Unfortunately for me, when I write, events keep getting longer and longer. What was supposed to be the first chapter, was split into 6 parts. And now I have to untangle the love pentagon.