One of the maxims I heard some thirty years (can’t remember who said it) was “All relationships end.” I’ve mentioned it before, and I still believe it true. Everybody you know, have met or will know, is going to die. That’s a fact.
Maybe you’ll die first, maybe not, but all relationships end. What you do with this insight is up to you. Time does indeed march on (or flies - depending on whom you talk to).