5. Don’t hang out alone with the opposite sex, even if he/she is a friend.
Some couples promise each other that they would not hang out alone with someone of the opposite sex, even if he/she is just a friend. There’s always a chance that something could happen. A woman in her 20s said it’s best to avoid such situations “just in case.” If you are meeting up with your ex-girlfriend/boyfriend, it’s best to meet them in public with someone else.