I wonder is he upset with me?

I have a friend I haven't seen in a long time and he recently wrote me a letter because I'm so far away he stated " Sometimes, being I haven't been around for so long, some people I feel too disengaged; I barely have anything to say, Its sad sometimes". We must have an mutual agreement and understanding to call each other on our mistakes and faults and errors!! It is our duty as friends to correct each other and ourselves, with humility, when we are wrong!! To hold ourselves to less would be diminishing!! We would only be betraying ourselves, for we must behave in accordance with who we want to be!! In the words of Niall Ferguson,"Its NOT the fault of the mirror if it reflects our blemishes as clearly as our beauty"....WHAT IS HE SAYING???