Is it worth sticking around?

Do NOT kill yourself. Life DOES get better. You're only 19 years, and that's so young. Life does get better, honestly. There are hardships and such but you don't realize that things WILL get better, and killing yourself will leave those who love you behind. Go out, make new friends like your old friend did too. There are other people out in the world too who are just like you, waiting to make friends. Take the first step and get out there.