1. You Aren't Having Sex As Often

If your sex life starts to slow down, don't panic. "[It] doesn’t mean you have a loveless [relationship]," Bonnie Winston, a celebrity matchmaker, tells Bustle. "Decades of proven evidence says that the average couple’s passion lasts just a few years. That means if you aren't really compatible in other areas, there's a good chance that your relationship won't stand the test of time." So, the fact you're still together, even though you're no longer having sex 24/7, can be a sign of high compatibility."