Breakup... Please help.

I'm going through a horrible breakup. My first one... The stereotypical teenage breakup. I need help... Any advice? I don't have any friends so going to friends isnt an option. I have social anxiety, parties are out of the question.  We broke up while we were still in love and I can't do this anymore. My body and mind are filled with nothing but sadness but I feel so empty at the same time. I'm almost ready to not be here anymore...