I agree with you. I have done a similar exercise you just recommended unconsciously and I get a sense of what you are talking about.
What am using for my self-love exercise is cancelling out people in my life who I think are negative to my life and I do it easily.
By 'canceling out' do you mean ending those friendships? It is definitely important to be selective in who one spends time with and who gets your attention. We truly do absorb a lot from other people.
Yes, I meant ending the friendship. Some people know how to rub you off wrongly.