Just..stop.

I got rid of a friend because she was a compulsive liar and honestly, she was a freaking joke. She wasn't "interesting" and people just played along with her and would pretend to believe her and care and they started talking behind her back because it got so ridiculous. Now her only friend is her "boyfriend" because she has sex with him almost every night and takes care of his kids while he's at work. Other than that they have nothing because she's so fake.

Stop making things up. Stop lying and find something you CAN talk about without lying. Stop trying to think of things to say. He's on the verge of leaving now isn't he and you have "interesting" things to say... So that blows that theory out of the water. Relax and eventually it should come naturally. This post wasn't a lie right? So start there. Bite your tongue or press the tip of your tongue against the roof of your mouth while you think of something to say. That might help you to not spit any new lies out.