It's a very strange experience;

When you lose someone that you were incredibly close to. Relationships for instance, you devote yourself to this person. You give your all for this person. You do everything in your will power to make them happy, because you love them. Yet after the heartbreak, it's unlikely you'll ever speak to them again, it'll never the same as it was. It's incredibly strange how someone who was your everything can become someone you no longer associate with. 

Maybe this is why dating friends is not a good idea? Being with your best friend maybe great, it could work in your favour. You might end up with everything that you've ever wanted. Or, it could all come crashing down. You could lose your relationship and your best friend all in one go. It's a very risky business.

The same applies to friends. How many people have you been incredibly close with, for it all to just disappear? Maybe you've just drifted apart, maybe you've had an argument and never fully made up, or maybe you've found something out about the person and it's completely changed your opinion of them. 

It's all part of growing up, and it's a huge factor of life. People will hurt you, it's a given. Those people who do, don't deserve to be in your life. The friends that stand by you through life, those are the ones to keep. Yes, you may have been close to people at some point, but things have changed for a reason. Try not to fret, life is full of puzzling and full of strange emotions. 

Stay happy! :)