Pretty much the above. ^
As for the people in my life, I know who my friends, family and close ones are. I'm not ditching them even if they are depressed, negative, complaining etc. I've read this kind of suggestion before, typically from self-help gurus/books, but I fundamentally disagree with it. The people you are close to deserve your patience and love except in the rare cases where they are abusive toward you or others. However, getting involved new people who are negative is another matter and there you should be cautious.