Generate a full detail guide on how to become your own best friend. The guide's tone should be deeply compassionate and practical. It must include sections on: 1. How to monitor and understand your inner critic. 2. The practice of speaking to yourself the way you would speak to a dear friend. 3. How to 'date yourself' and enjoy your own company. 4. A list of ways to celebrate and support yourself through challenges. Please include a supportive disclaimer.