Things about life

How are we supposed to know how to manage certain situations in life? We weren't born with a handbook to teach us how to act and how to manage situations.

How am I supposed to know when it's time to stop feeling this way and start living life? 

I  know I'm not different from everyone else and that I have a purpose in life I need to complete. But what if I don't even know where to start? What if I am so scared that I am just ignoring the fact that I have to do what I need to do to have a life?

I don't want to keep living this way but at the same time I don't know how to stop this never ending cycle. I need help but I don't know how to ask for it!