Avowed positive thinkers will tell you that happiness is a choice. You may be able to find an argument with that theory right now, Sagittarius, because you are dealing with a lot of challenges. It is true though, in the sense that happiness is "in the moment" and there is always something beautiful to appreciate that way. However, the circumstances of our lives play a role as well. Do your best to stay optimistic and upbeat now, and very soon life will give you a few very obvious reasons to be perfectly happy - perhaps even ecstatic!