Involving a friend in your relationship is very risky. Especially if that friend is single.. When I mean involving your friend in your relationship, is when you let your friend know every detailed thing about you and your lover.. Some friends are Judas (betrayers).. Giving them informations about your lover would be a sweet opportunity to execute their evil plans.. Some bad friends can go through Extra length to bring an end to your relationship.. Being cautious and observant in your relationship is good... Is not being possessive but wise and alert.. Many people have lost their lovers to bad friends.. So no one is to be trusted..