I'm going to be short and to the point, and hope you will take it well. I mean the best, as I myself have been in this place.

Based on what you wrote, it seems like you are only focused inward, on yourself. Figure out a way to focus on someone else.

Had an old, wise friend tell me, "You learn to love, by doing for..." i.e. when you tend to someone who is helpless, you are focused on them, and their needs. You gain a whole new perspective on life.

Do _for_ them. Do something that doesn't bring you any gain or benefit. Just to be a good human. Selfless.

Kids make this happen, naturally. But I'm not suggesting you go have a bunch of kids, just for that, I hope you get my drift.