Is it normal if you think you're mental?

Your second comment scares me because everything is true. I do believe Im bipolar but not very serious yet it still interferes with my daily life. YES I have a "best friend" but who knows if he feels the same way even if I tell him a lot of things. I sometimes want to discuss it with him if were considered best friends. YES I feel like I think too much where it holds me back from socializing and going with the flow. But I dont want to be a hypocrite and do something I know is dumb or wrong, I mean just to fit in? I hesitate. YES my family thinks Im the strongest of all of them cause I wont cry for things I should be crying about, but that doesnt mean Im not emotional because the tears will come out when Im alone in bed usually. And YES recently Ive been noticing that my body will shift from one day it looks slim to another I feel like a blob. There are days where Im just in such a good mood that Ill act silly and just wont care what others think. These are the days that I wish would last because Im being myself and Im happy. But then the days come where my personality shuts down and it sucks because people cant meet the confident, silly person that I am but instead, this awkward mental loser. I want to start accepting myself rather than keep trying to find a solution when I can be doing better, beneficial things as I see others w/ flaws do. If they can, I can.