What should I do on my bday?

So I'm turning 19 next week and I swear I'm gonna be spending it alone. I've lost all my closest friends, there's no point in trying to reconnect with them now.. And I'm REALLY not close to my family at all. We are not really getting along... Soo I'm all lonely LOL. my usual days are coming home from school and just staying home all days & weekends. I don't even go out and socialize no more. I usually do things on my own now ( shopping, getting manicures/pedicures,etc) I'm boring cause I've stopped drinking & smoking weed so yeah, it made me lose touch with alot of people I've had. So what do you think i should do? What would you do?