Meet someone who you like right now, but in a few months/years will grow tired of their constant gripping, less-than-average hygiene, inability to not create a co-dependent lifestyle and general lack of desire to do something with their life. Then, depending on how far said relationship got, and let's hope it didn't get too far, you can simply call them, send a text, post something on youtube, or unfriend them on facebook. They should get the general idea.