I haven't read other replies so if I repeat, excuse me.
I think a lie is a way of having control over something uncontrollable.
The fact you feel the need to lie to get what you need, seems to indicate you have in the past not got what you need. That's been left for so long in your life that your inner child's attempts to get what it needs isn't working. The adult you knows somethings off, but with no inner communication having happened the miss match between the you in the here and now and the you from your childhood is showing itself in your life as you describe in your post.
I'd prefer an in depth therapy if I were you (and I have been like you).