I'm sorry you're having a tough time. I can understand you not wanting to depend on other people or be beholden to people but it honestly seems like your boss and landlord are trying to help you out. I wonder what impression you are leaving by not answering emails for a day or turning them down. Most people feel good when they help others.

Can you allow them to help you with small things? I understand where you're coming from. I'm a loner and introverted, I just encourage you to make a positive impression. I think it's trust issues. I'm also terrified with 'mini relationships' as well. I get it. I also get me against the world. Do you think exposure therapy or a therapist can help you? Best wishes.