You're Not Getting That Inspiration From Your Current Friend

The point of spending time with other people is to ideally start to pick up on some of their good habits and good traits that you wish you had, so that you can become an even more well rounded person. The excitement of a friendship will fall away when a friendship ends because the inspiration in admiration kind of dies. That's not necessarily a bad thing - it just might mean that you need something else in a friendship. You need to find a new source of inspiration within someone else.