I've strayed from my faith and need guidance

As-salamu alaykum. I embraced Islam at a local mosque, studied there for a year, and devoted all my time, energy, and money to getting closer to Allah. I experienced countless 'coincidences' (for example, I once prayed for a sign in the sky and saw the Northern Lights that very night in Germany-that's just one instance). I had a deeply personal connection with Allah that others noticed too, but recently things changed. It began in November. Financial troubles started, and I became dependent on my mother, with whom I was living at the time. I also had issues with my best friend, which improved later, but let me continue. Then I fell into a deep depression because I felt some people had taken advantage of me. I dropped out of university to pursue a personal business with the local imam, whose son was my best friend and blocked me during this time. I accumulated debts and felt like I was becoming a slave, working only for others, not myself. I had an agreement with my mother to pay 600€ monthly while living there, but it prevented me from ever getting ahead. Additionally, my mother made me mentally unwell every day, and my three siblings seemed to enjoy bullying me. I kept going but wanted to pay off my 1.2k debts in March and end it all... When I paid off my debt, I quit my job hoping to end my life one day, but I found myself again and told my mother everything. For a week it was okay, but the moment I started guiding her towards righteousness, Shaytaan made her go crazy. She hits herself in the head with her fists over extremely minor things. She only sees problems. SHE'S CRAZY. And she backbit me everywhere and ruined every single one of my relationships. In May, I asked to marry the imam's daughter, but he refused because he wanted someone who studies (something HE convinced me to drop). A week later, I knew beforehand it would happen: I became homeless. I couldn't live at home anymore. I HATE MY MOTHER. I genuinely prayed for her death so we would all be free, but that she still goes to Jannah. Once I became homeless, I asked my former best friend if we could at least *talk*... not financial help, nothing else, just... talk. But he said he didn't want to 'stress' himself. That's when I lost hope and respect in all Muslims for the time being. While homeless, I took care to stay clean, look after myself, and so on. I remained good and prayed at least a couple times a week, trying not to forget Allah. But soon I began praying that my mom and my kafir best friend take Islam, because when I went back to the masjid, I was defeated once more: my former teacher said I'm the way I am because I'm under attack from jinns, without explaining further 'how I am.' I asked, WHAT did I do? Because, can't you all see that I have no family and friends like you all? That I'm focusing purely on pleasing Allah? Just because I have problems doesn't mean I did wrong. The prophets were the most tested of all. Anyway, when I prayed for this, a new person came to our homeless shelter: a 'Muslim.' I grew fond of him because he reminded me strongly of my former best friend. Both 'gypsies.' Over time we became close, but his parents dragged him back to their house... in a local ghetto filled with gypsies, Portuguese, Bulgarians, Romanians, Polish people, and so on. I felt truly at home because I originally grew up in such places. So they dragged me there with him. Now, I've started smoking, using intoxicants, listening to music, and not praying. I'm even doing sketchy stuff. I've become a literal gangster, more than I can admit online. Now, I'm listening to Spanish songs feeling like a lost gangster, and while I've been happy for once... I feel that I've lost my connection to Allah. Am I to blame? Will Allah rescue me? Can I ask for forgiveness? What should I do? I already cried when I realized that if I want to keep my new friend, I have to follow him on his path as he would not follow me... But I'm tired of being so alone. I'm so sad; I just want a family... and he is that for me.