Struggling with Depression, Anxiety, and PTSD

so I have severe depression and anxiety around people and ptsd, I'm always angry and people try to avoid me all the time because I can sense that they sense it, if that makes sense. I'm alone I have no friends and I don't talk to my family because I'm mad at them , I feel because my depression is so bad that nobody ever talks to me or checks up on me because I'm negative all the time now, which makes it worse, but at the same time I push people away because I don't trust people anymore as friends or anything , I had to deal with so many 2 faced people in my life that I just shut everyone out now but I feel alone at the same time . sorry this sounds confusing, but I hate being like this, I want to be my normal self again, but idk how to get out of this and I feel like I never will.