I always feel the need to HAVE TO be busy? help?

i can NEVER want to be alone,i always need to have an entire GROUP next to me(of people i know of course!)i dont feel safe when i'm alone,i have an extreme anxiety,i dont know what is wrong with me??i never want to be alone,i always need to be at a party or surrounded by the people i know,even if it's my enemies,what do you think and how do i overcome thi anxiety????i am being serious please help!!