What is self-love? Can someone break it down for me?

I want to love myself. I want to take more care of myself. I don't want to look at my body and think that "Ah, I'm slowly degrading," yet I'm not doing anything about it.

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I don't want to wake up feeling tired and depressed in the morning. I don't want to ask for love towards shady people anymore. I want to love myself but I feel lost because it seems like I do not know how. I have been depraved of love all my life.

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I'd like to think that some way down the road, I have made self-love but right now it's hard to see because my bf broke up with me.

Now I realize I'm on a deep hole I've dug myself and I cannot get out. I cannot stop feeling like this.