To answer the title question, yes, it's very possible to have Bipolar without CLEAR mania. Hypomania is required though but hypomania can be so subtle as to not recognize it in yourself and just see it as having really good days. During hypomania I wake up refreshed without needing as much sleep as normal, I talk quicker and more....am more social and seek out people to talk to.....spend more money, laugh at everything and feel really good mentally. Nobody would think "that girls crazy" they would just see me as friendly and upbeat. I agree with the others that you should be evaluated. Some things you've written point to the possibility but nothing that jumps out and say absolutely. Good luck and take care.