Just like the only constant in life is change, the same can be said for relationships. Can you point to a relationship in your life -- whether with a friend, your partner, or an old coworker -- that is exactly the same as when you first met the person? Relationships evolve, just like the people in them. They go hand in hand. Experiences and lifestyle changes lead to changes in both individuals, which in turn effects change in the relationship. If that weren't so, we'd remain very close with every person we've called a friend. But we all know factors like distance, scheduling conflicts, our job, marriage, and kids can change the dynamics of a relationship. It isn't always easy to swallow such changes, but that's what life is all about -- adapting to changing circumstances. Sometimes people change for the better -- like when they give up smoking, become more helpful around the house, and so on. In other cases, however, people can behave in ways detrime...