You have a long way to go - and it's good that you realize it.
My recommendations:
It is hard to offer any kind of responsibility to someone who has let you down - so I recommend that you take the initiative to create situations where you show that you can be depended on.
It is often seen as selfishness to lie and bring everyone's attention to yourself by creating drama - so I'd recommend showing some humility.
When your actions don't reflect the opinions that you've expressed, your lies look manipulative. So I recommend that if anyone is still talking to you, that you explain to them your motivations for things you say, ways you might word things, decisions you might make.
By declaring your intentions aloud, the people around you will hold you accountable to them - let people know what your priorities really are.
Finally, if you're feeling worthless, which is bound to happen while you're still rebuilding trust - create some self-worth by creating some positive karma for yourself - volunteer for something - a shelter, a church, whatever cause sparks your interest, or help the elderly mow lawns and shovel driveways. And reliably!
This may sound heavy-handed, but 1) you asked and 2) I'm still bitter! - I'm working on it.
