You don't want other people to interfere with your relationship. If they do, then it could cause everything to fall apart. That's why you need to be careful with the friendships you make. According to Prevention, these people could ruin your relationship:
1. Your Work Spouse
It's perfectly fine to have a guy friend you get along with well. However, you don't want to get too close to him. If you do, then your boyfriend is going to get jealous of all of the time you're spending together. Just be careful not to cross any lines.