First off, you can't get a diagnosis because you had feelings when you were drunk or smoking pot. Those are two things that effect both perception and your feelings. Bipolar isn't bout 'emotions.' The swings in mood may cause us to be emotional but emotions and moods are two different things. Happiness is not the same thing as mania.

Next off, the whole point of getting a diagnosis (and growing up) is learning to take responsability for yourself and your actions, learning your triggers and coping skills to deal with them. It's not easy. If you need meds to help with that as well, then that's not the end of the world. But, before you can determin any of this you at least need to get into a therapist, and if you think you may have bipolar then you need to get into a psychiatrist.

If you like the way you are, then you wouldn't be seeking out advice. The two reasons you are seeking advice is either you don't actually like the way you are; or something happened with another person that told you there is something wrong with you (which may or may not be true,) so to apease them or help yourself feel better about it, you are asking advice....

Either way, it's good to talk to a professional if you're having difficulty managing yourself and it's disrupting your life.