Someone i went to school with committed suicide 2 years ago due to schizophrenia and i can't stop thinking about them and it bothers me a lot. why?

Suicide: If you are a caring person- it is normal to be impacted by knowing that a peer was in so much pain that he or she committed suicide. Suicide is a permanent act. If you find yourself overly focused on this - it may mean that you were traumatized by this. If that is the case - consider talking with a counselor or spiritual advisor so that you can work past it. take care.