I feel miserable,i cant get friends nor get a gf?

im 19,i never been outgoing,i try making friends,its no use,i try talking to girls,i get their numbers,but they barely talk to me,just a few,im not in college,but im tryna get my GED diploma,im kinda shy,i work,girls always tell me im very cute,but ima nice guy,but thats it,one girl likes me,and told me shes attached to me,but she has a bf,and hava lot of guyfriends,and was talkin to me a lott for thr first 3 months,but now,she never talks to me,shell out one word,and its not the same respond.meanwhile,i have no car,my parents are struggling as well,so they cant help me,they want to,i need help,i don wanna die,but sometime,i wonder if i am living for a reason?it feels tough to geta gf,neva the less,find the right one,im not really tripping over friends,mainly a girl