I understand the clarity thing, after coming out of the fog of Citalopram I felt it clear after a while on the Sert'!
As for the friend thing, how do you know you have lost them? Have you spoken to them? Perhaps being anxious has made you withdrawn and you have just lost communication with them?
If they were real friends they should be there for you no matter what happens but may need you to make the first move now your anxiety may be lifting? It's so easy to get caught up in our own lives and forget others i'm afraid.
Don't right off friendships in haste, but if they really have forgone that friendship due to your problems then good riddance they were not true friends, just friendly with you.Steve