The fact that you noticed the trend of less socialization with others — and living more in your imaginary life — is important. The part of you that realizes this is the part that has that concern. Honor this unease. Since you are still in high school I recommend talking to your school guidance counselor. It would be important to talk to this trusted adult about this experience. The fact this is a concern to you is enough. I wouldn’t worry about the diagnosis — or labeling yourself as “crazy.” I would simply respect the fact that it makes you feel uncomfortable, and talk to someone who could help you sort through.