For me, loving myself is having the self-respect to take care of myself physically, mentally, and emotionally. When I let any of that go, my love for myself diminishes.

Am I taking my meds like I know I need to? Am I actively working to regulate my eating and sleeping? Am I participating in activities that feed my soul such as church and chorus? Am I actively using the skills I know to deal with crises as they occur?

It is not just sitting back and letting life happening to me; it is actively working to make my life happen in a nourishing and healthy way. If I do any less, I am not showing due respect/love for myself and my mood, health, and stability suffers.

That's my definition. I'm guessing it is different of each individual.