This topic may sound absurd to write upon, but wouldn't someone agree that there is no brutally honest friend than a mirror? It might not talk to you back but it does talk to you. When after a breakdown you look yourself into the mirror don't you pacify yourself that this time will pass? Don't you assure yourself that good times are on their way? Or when you are happy don't you see yourself in the mirror and try to believe that things are working out? You are glowing! If you don't then you should. Mirror never lies. It just reflects what you feel. You may talk to a friend but most of the times friends just try to show you positive aspects of every situation. But do they challenge you? Do they tell you that you have to get out of your worst times on your own? Do they support you to be strong enough? You might have such friends if you are lucky enough but not everybody is that lucky. Whereas if you talk to the mirror it will force you to change the situations because who wants to see themselves crying everyday? 

And also when you talk to the mirror (your own self basically) it helps you in gaining confidence. You understand yourself the most and most importantly you don't have to paint the past picture for your own self. 

At times we are so much dependent on others that if they are busy or unable to give us some of their valuable time we lose all the hopes of what to do on your own. Believe in yourself! Trust yourself! Wherever you are today it's an achievement to be proud of, or a lesson you learned on your own of what mistakes one shouldn't repeat. You may not see your worth right now and also you may not feel you are important to anyone, but ask yourself for how long do you want to be important for someone? Are you important for your own self? Will world be the same place without you in it? Your story is important. Your pain, your success is important. And tell this to your self everyday. Talk to your self in the mirror. It will reflect your confidence, your self esteem, your pride, your worth. Talk to yourself looking eyes into eyes. Also tell yourself- “YOU HAVE COME THIS FAR, NOT TO JUST COME THIS FAR ONLY.”