Its possible you’re kin, or that you are fictionhearted, or that the character is a synpath. What is clear is that the character effects you in a significant way.
My advice is to try to process what you’re feeling and why. what about the character is ‘getting’ to you. See if you fit the criteria for kin, hearted, etc. Do a lot of introspection. Ask a friend to help you, sometimes an outside perspective from someone who knows you is helpful