I gave someone advice about their overthinking of relationships. I told them 'do you think the people you think about, think about you as much as you think about them? If the answer is no, then why are you directing so much of your internal energy on them?'. Just leave them alone, and let the idea of you not being there marinate. If they cared about you they would know. If someone loves you, you would know.
Sound advice
How can someone expect you to treat others with kindness if you can't treat yourself with kindness?