Don't be an emotional vampire.

Someone said: "Never trust someone who lies to you. Never lie to someone who trusts you" - and I'll use the same code for love too. Anything contrary could only possibly result in unwillingness, unpreparedness, or inability to believe. Always remember that recovering possession of a trust that once was will not be as easy as it was gaining it.

It is better to be everything someone thought you never were, and in a good way. Than claiming standards, qualities, virtues, or motivations that you do not actually have. Don't be an emotional vampire.