Why do some people plays double game in friendship?

haahhhaaaa. you spent more time to understand this. it is not new. This is a continous process from the ancient days. There may be any reasons for this such as jealous etc.,but a man should keep his friendship to certain level. so, be faithful with friends and at the same time be careful with them. i am happy atleast now you learned a lesson since i also got such experiences many times. The experiences are the lessons. wish you good luck.