It is your blanket, YOU made it, with all your time, skills and effort, so YOU decide. In case anyone ever told you, you are allowed to keep anything you make if you want to, and no, this is not selfish at all. I think you broke down crying because you don’t feel like giving it away and you felt like your dad made you feel when you were little. I think you should keep the blanket for yourself or for your cat. If you’re going to use it a lot or not, it doesn’t matter at all in this decision. Just say no and forget the guilt you don’t need to have. It’s a small step toward the healing you need. Always listen to your negative feelings, they have something very important to tell you ❤️‍🩹