You'll outgrow certain people in your life, and sometimes the only place they'll have in your life is in your past — and really, that's just part of life. Don't let your memories be the only reason you're keeping the relationship — be it familial, platonic, or romantic. Perhaps the person you're hanging onto is no longer the person you once knew and loved. Cut your losses, remember the good times, and move on. And people who leave you behind? Well, you can't stop that from happening. When someone tells you it's over, believe them, and let them go. And don't be sad if they leave a hole in your life when they leave. Trust me, the hole will be filled up.