I'm sure if you google that you will find an array of alternate advice; I can only tell you how I did it, which was with the solidarity of my friends who came with me to get my things, and who stood by me and responded on my behalf when the person I was leaving was saying anything to try convince me to stay. Their answering for me (just stuff like "she doesn't want to talk to you", but reiterating it as many times as it needed to be) allowed me to focus on getting what I needed, and while I left a few things behind it was worth it. My friends had realized before me that he was lying to me, and been deeply hurt for me and frustrated by it, so when I'd finally had all I could take they were relieved and happy to help me make the break. All they were doing was standing by me and not allowing him to talk his b.s. to me, but for me it was immeasurably helpful.

Maybe I could have been nicer about it, but all nicer had gotten me so far was further entrenched in this person's lies. I needed to make a clean break. This person was lying to me about money he wasn't really making, opportunities that weren't really happening, drugs he supposedly wasn't taking, and looking back I think I am very lucky that nothing worse happened to me as the result of any risky behaviors he was involving me in by proxy, besides my almost going broke fronting money for all the expensive plans he had that he was never really going to be able to pay me back for later. I was pretty far in the ditch by the time I was finally able to face up to the fact that it was all a farce. For me though, I've found that the more I've had to cut my losses, the more I've learned from an experience, and my tuning fork for lying has been a whole lot keener ever since. Small favors.