Dear Mr Perspective,
How are you? It has been a while hasn't it? We really should meet up again some time soon.
I have to admit I have missed having you around. Have you seen much of our good friends Miss Happiness and Mr Hope lately? The four of us used to have such fun together.
Lately I have got to know Miss Sadness a little better. I know you don't get on so well with her. I have to admit lately I have been getting a little fed up with her too.
Please get in touch I miss you. Hoping to see you soon.