If you knew better you'd do better, and if you felt better you'd date better. We date at the level of our self-esteem. Your relationship is a direct reflection of your own self-love and self-worth.
A lot of TDL Seekers have written in saying that they are in a relationship (dating, marriage, etc.) with someone who they really are into, but they are not getting their needs met. They keep asking me how they have to change to keep the relationship going.