Dear cat,
Although it might sound crazy, you have supported me through thick and thin even though you can't do anything but meow, purr, sleep, and eat. You have given me the love and attention I seek without having to say a word (well, you can't say any words at all.) You have influenced and affected my well-being in an extremely positive way. Needless to say, I love you as much as a dear friend and am lucky to have you.
It's almost as if you're aware how I'm feeling physically and emotionally. When I'm ailing, you know to be right up against my side and be as loving as possible. I appreciate your empathy deeply; sounds crazy because you're not a real person, but I value you lots. You've sat by my side through long nights of homework, stress, and so much more.
It's said that animals improve your mental health, and I would have to agree. Ever since adopting you, I have a responsibility and a wonderful one at that. Although you walking all over me in the morning may not be the most pleasant, you get me up and help me start my day by wanting to give me attention so early. Laying in bed all day is no longer as depressing as it used to be because I have you by my side. Anxiety attacks are easier to get through because petting you and hearing you purr puts me at ease.
I doubt you are aware of any of this because, well, you are a cat. However, I hope you know how much you have helped me and how happy you have made me. I am still aware of how silly it may seem, but you make life easier for me. Also, please know that I will do everything in my power to care for you the best I can. You will get as much love in return as you give to me if not more.
Sincerely,
Your forever grateful owner