<human>: Could you distill the essence of the text into 1-3 sentences?

I don't have the heart to break it to my parents that I can't have an eighteenth birthday party, or do anything for my eighteenth birthday party, because I have no friends.

My 18th birthday is coming up in August, and I'm very worried and scared and embarrassed about it. I just know it's going to be terrible, and I'm going to fill like utter shit throughout it. I don't have any friends at all, and it a fucking kills me; I have no meaningful attachments with anyone my age, no genuine friendships, I am worthless to everyone and am genuinely suffering a sort of crippling loneliness. Scrolling through social media like Facebook or Twitter or Snapchat is very painful, seeing how popular and likeable people are and seeing them do amazing and fun things with their friends...and it both devastates me and makes me insanely jealous. Seeing people go to parties, have fun, go on road trips, go on holidays, just hang out...I've never experienced anything like that. Hell, the last time I remotely did anything with another person was a year ago. Every day I spend in my house, on the Internet...and that's it. 

My twin sister has been going on recently about how excited she is for our birthday and how she's got all these amazing plans with her friends. It kills me inside. She has a really large friendship group and she goes out every night and there's me like a fucking loser at home, again, watching TV or something until I just fall asleep.

So I have absolutely no one to invite to an eighteenth birthday party, but my parents keep insisting that I should do something and invite "my friends". I don't have the heart to tell them their son is a worthless, unlikeable, unsocialble friendless person. Any advice?
<bot>: Eighteen male. Have no friends. How do I tell my parents that no one will turn up for anything I plan on my birthday?