1. Complete dependence on one another. We’re all guilty of this one in our adolescent lives. Young love is just so new and exciting and compelling and you just can’t spend a minute without that person… and it all comes back to bite you in the ass when you break up and you’re left with nothing because your whole life revolves around your former special someone. Don’t do this to yourself. If you know you’re in the middle of this, stop digging the hole and start climbing out.