how to keep a friendship alive

A friendship network is absolutely crucial for our well-being. We have to do the hard work of building and sustaining the network. Here are some important ways for accomplishing this. 
let go of your less central friendship. Many of our friendships were never meant to last a lifetime. You can pull back from some people that you don't really want to draw close to and give the most promising friendship a fair chance to grow. 
Be willing to " drop everything". If you can't be there at that given moment, say something like, "I wish I could be with you. May I call you tommorrow?" Be sure your friend knows she's cared about. 

Risk expressing negative feelings. Remember honesty is the key to keeping a friendship real. Sharing your pain will actually deepen a friendship. 
Understand that long-term friendship wax and wane. But understand that if you need each other, you'll be there for each other as much as you can. 
Never underestimate the value of loyalty. Loyalty has been always rated asone of the most desired qualities in friends.