How can one achieve his/her own dreams if nothing is summing up?
"God Provides Food for every bird But not in its nest".
It may be time to reevaluate how you are trying to achieve your dreams. Plan out concrete steps toward achieving your dream. Each goal should build on top of the other (sequentially), and your immediate goal should seem reachable with some effort.
Realize that all dreams can be achieved, but often dreams change over time, and there is certainly much to be learned in the process!
There is another aspect to this. Woody Allen famously said that 'Showing up is 80 percent of life.' Even when it feels like things are not, as you say, summing up, even when everything you do appears to be in vain, it is still important to keep showing up.
We could all just hide in bed, but that is not a viable option.
Rise up To the Challenges ahead of you and Conquer your fears.