For years I have had the habit of swallowing nonstop so I've no saliva. Over 4 years it has grown so worse?

I have to suck on my lips whenever I'm out and especially when I'm about to talk to someone, and I am this terrible communicator. I have no self-esteem and I just want to die, but anyway I try my best to stay away from people because IT'S HUMILIATING FOR PEOPLE TO SEE ME BEING THE AWKWARD ************ I AM. So that's why. Will I ever overcome what SEEMS to be impossible to overcome? Well my doctor said saliva increases when ur nervous but this was couple months ago and the "special doctor" whoever he is hasn't contacted, but anyway damnit this is the problem which is that I'm nervous when I'm out so I can't take my mind off having to swallow all the time and even if I swallow normally (without having to suck on my lips) I have to suck on my lips anyway coz there's still saliva. Now I know that means sucking on lips is the habit I should stop but I can't. Will I ever be normal and charismatic again? P.S. I apparently hav "elements" of Asperger's...How can I overcome this stupid habit?