Doubt kills relationships. The main goal for a successful relationship is to enable both members to successfully deal with emotional swings.
You do not need someone to complete you, but someone to fully accept you.
It is important to form healthy, successful relationships and enjoy all the positive elements they bring to our lives. Such relationships are governed by: trust, respect-understanding and boundaries.
The only people who deserve to "stay" in your life are those who never left!
The relationships we create with the people around us are called interpersonal and are an integral part of nature and civilization of humans.