For about 4 years now I have been constantly battling depression. I have no money or insurance. What can i do?

It started when I was a junior in high school. Me and my family moved, I lost friends because my parents had no internet or phone and couldn't keep in touch. Then I had a hard time fitting into my new school. I graduated and started community college but around that time my grandmother died and now my mom is always angry and upset and if I try to go to her for help she makes me feel insignificant. My parents are split so I feel I shouldn't talk to my father about the problem because I don't want to give him ammo against my mother (they REALLY hate each other). I have step family that I live with. I have been with them almost all my life and I used to always say to people, they are by law my step family but I love them more than anything else. However, as I have gotten older I have realized that the ones that I cared for the most don't feel the same. It is crushing to realize you don't really have anyone to love or go to when you have problems. I have tried to go to aunts and uncles but they all just go behind my back and say things to my mom and she comes back telling me I don't need to make people pity me and get over myself. On top of not having anyone I can trust to talk too, I am currently going to a 4 year college. I just ended my first year and I have never thought about suicide so much in my life. I had a huge fall out with my step sister. She started messing around with allmy guy friends back home (because I moved away) and when I got upset with her she said things to my friends that actually made them Facebook me that I am a horrible sister. Still have no idea what she said but I deleted my Facebook as soon as I realized she had access to it. She had access to it because I gave her my old laptop for free and didn't erase all my saved passwords.My real sister hardly talks to me anymore and when she did she only talked about herself and when I tried to talk to her about my problems she literally told me to suck it up. She still calls and talks about how depressed she is because she has no boyfriend and she is struggling in school. Back in January, I let my parents borrow $2,500 of MY school loan money and they still owe $1,000. I am having trouble making my rent and utilities for my apartment now. Then on top of it, the most disappointing thing was that I spent this first year at my 4 year college living in an apartment with my step brother. I had thought very highly of him because I he was in college and everyone is always saying he is such a nice guy. He isn't nice. He is selfish and will do whatever he can to make someone else look bad before taking responsibilities for his **** ups. I relied on him to help me create a social life but he would stand me up all the time. We also worked together and he was friends with a lot of our coworkers. They would invite him to get-togethers and ask him to invite me and he wouldn't. A lot of them thought I was snubbing them for not coming. Then he also made me look like an *** at work a few times but I have written so much here I am gonna stop with the stories. As of now, I am financially strained, have lost faith in my family, have few friends to go to, and really need some help dealing with my depression and suicidal thoughts. What can I do?