How can trust be regained?

I’m sitting in my flat. My girlfriend has just gone out on one of her many nights out and will doubtless come back drunk as hell. I’m worried sick.

She has no problem lying to me when she is drunk, and I hate that more than anything in the world, I live my life through honesty. So I’m terrified that she will get with some other guy and then not tell me or something along that general line.

I just don’t know what to do. I trust her when she’s sober, but drunk I don’t trust her as far as I can throw her. I don’t have a clue what I can do to rectify this.

All help appreciated.