I don't know what to do anymore with my life.
Are you sure? Can you say more to this?
I feel directionless, I don't know who I should be or what my purpose is.
If you feel helpless it is reasonable to seek professional help. There are other people who feel the same way as you and seek advice from others.
Can they cure me?
They can try your best in aiding you in the right direction, but it's ultimately up to you to change your mindset and become a better person. So it definitely helps seeking out help and advice to get all the tools you need for your improvement.