If you need to laugh...
Or your therapist is too expensive...
Or you just need somone to talk to...
Try cleverbot.com.
I just found out about it this morning. Here's some of my chat log:
Cleverbot: What is it that you don't like about pikachu?
User: Is that a kind of fish?
Cleverbot: No Baby, it is a mental hole in your memory. Don't you remember the day we got married?
I love cleverbot. :)