I knew this as a child, then was forced in public school to make nice with all sorts of children who were not nice at all, then had to unlearn letting folks mistreat me. That took decades. These are wise words that are very hard to learn. Identify the people who do not treat you lovingly (and if you look closely, you'll find there are a lot of people they do not treat lovingly) and stop spending so much energy on them. Love them still, because love IS the answer, but don't expect that back.
These very simple words you post inspire such deep thinking. Cool