Honestly, how do I meet people- men- friends?? sort of getting depressed? people never approach me?

There's nothing wrong with being a quiet person. You don't have to label yourself as shy or listen to your Mom's negative comments, tell her kindly she's not helping. If you are going out and getting involved in things that's great! Try starting conversations, use the persons name and make sure they know yours, Next time you see them you can build off previous conversations. Ask friends to set you up maybe and go out as a group. You're still young and building more confidence every time you talk to people!