alright, i'm gonna say something and please don't think i'm choosing sides here... if anything, i'm on your side.
yeah, it's not right that you haven't been respected. but from a young male's point of view, if he was to truly respect you, then there's a good chance you would find him boring or not good enough. i know that sounds backwards. it is! but it can be the truth when it comes to lots and lots of young people and the relationships they enter into. i've felt that i've always been a good guy, pretty respectful of everyone around me. but believe me, when i was younger it was definitely noticeable that the guys around me who behaved "badly" got rewarded with having girlfriends. whereas i'm just sitting there thinking "damn, i must not be good enough or something, i don't get it". things are just so backwards at a young age. the good girls, want the bad boys for the most part. the guys want the promiscuous girl, and often overlook the nice girl. it's just all backwards.
i know i'm not of much help, but i imagine you are good enough for just about anyone. it's just that you've been hanging around some low-class individuals. just chalk that up to living and learning. i mean what, were they nice at first and then all of a sudden turned very disrespectful of you? i hear about things like that happening with girls, like they get tricked or something. but someone can only use you, if you let them. you've got to stand up for yourself, it sounds like you are in the process of learning how to do that. there are good guys out there that could totally make you happy, you just have to get lucky enough to meet them. i know the last thing you want right now is to put yourself back out there and take a chance again, but i imagine you'll be ready one day soon enough.
if you really are starting to feel really down and depressed, then i hope you have someone in your life that you love and trust that you can speak with. maybe like a cousin or an aunt or best friend. someone who will honestly listen to you and offer you their honest advice. it can even be your parents, but i know that sometimes they're too busy being parents and forget how to be your friend for just a minute. all i'm saying is, don't let this one issue start to overwhelm you. please don't keep your feelings bottled up. get them out on the table and talk about them, just like you and i are doing right now.
best wishes to you, we've all got things we struggle with. it sounds like this is your current struggle at the moment. but you can get through it. without knowing you, i imagine you are good enough to bring joy and a smile to someone's face. someone who will respect you like you need. take care of yourself ok