Sorry to hear about your situation. Without sounding patronising and judgemental, I would like to reassure you that many of us lie for various reasons and in different circumstances. You have been brave to identify the problem and seem genuine in wanting to change. While there is little you can do about the past, you would benefit from attempting to identify, what is it you want from relationships or life in general. If you are able to identify the purpose in life, there won't be need to lie or impress others with pseudo-self. Best wishes.