No one can diagnose you here. FWIW a diagnosis of bipolar 1 requires at least one episode of mania, which is a fairly specific diagnostic. There are softer forms of bipolar but those are more controversial. Maybe if you were busier and just dead tired at the end of the day then the restless energy might lessen. Even within any diagnosis (and I'm not saying that you do or don't have a mental illness) there are huge variations in functionality and quality of life. You definitely want to be on the high functioning side no matter what so lifestyle changes are the best bet over all esp that you are not interested in medications. What I'm suggesting is to treat the symptoms irrespective of their origin. It could also be ADHD type of things or part of anxiety.