Why is life never easy?

You know it frustrates me to no end when things just don't go my way all of the time. I know that as I have aged and matured (I hope) my personality has changed. I no longer am the quiet, fat girl sitting on the stool waiting for someone to come and sweep me off my feet. Now it is usually I that is picking (literally) someone up and falling down with them. I'm so much more outgoing now but yet I am still the girl that is waiting. Just waiting for what I don't know. Waiting for life to catch people to realize that I'm not as fun as they think, waiting for people to tell me that I am not as interesting as I perceive to be, waiting to be told to shut up and stop talking about yourself, waiting for life to end, waiting for things to finally go my way; I don't know. Happiness, complete happiness is sometimes just a figment of people's imagination I think. How can everything in life be completely perfect so that the only emotion that you have is happiness. Does anyone ever reach this moment or do we all just strive to get there and the idea of it is why we keep living?
As you can see my thoughts are all over the place, this is how my mind works all of the time. Maybe now you understand why I'm not the most energetic person in the world. I think that we are divided, people who are physically motivated and people who are mentally motivated. I'm in the group that is menally motivated. My mind is always racing with ideas; if I could have button to turn off my mind or just to slow it down sometimes I think maybe I would find the energy to take up jogging or at least walking.