When I decided to stop going to therapy I said (and it was true): "I went last week and got a massage, and it really made me feel good. And I can't afford to do therapy and get massages. So for now I'm going to stop therapy and get a weekly massage. If I go nuts and need to come back I'll give you a call." And I really did do weekly massages for a while, too! 
OR you can do it the Steve Martin way: you say "I break with thee, I break with thee, I break with thee.", then you throw dog poop on their shoes.
One beautiful summer day I sat outside my therapist's office and realized I did not want to go in there and talk to her - like you said you felt, I too realized my voice speaking my troubles was starting to bore me. I went into her office and said I wanted to enjoy the summer without dwelling on the things from my past that still cause me pain today, and that while it was good for me to acknowledge the issues from my childhood that cause me unhappiness it wasn't helping me anymore to continue to dredge up the memories. So I told her I was taking the summer off and would get back in touch when I needed too. Funny thing - just today I looked for her phone number because I do feel like I need to go back for a little while at least.
Commenting by HaloScan
