This is true. This society is ruthless to mentally ill homeless people. But for your own sake, as you cannot break the rules of your lease agreements (which sure stipulate not taking in people overnight more than occasionally) and become homeless yourself, can you channel your energy, empathy and conscience to something safe for you? I am thinking of volunteering - there must be some local agency helping those people. There is a test for narcissism on this site. To be normal, you need to score - if I recall correctly, 12-15 points. Not zero. This is called "healthy narcissism". You lack that. This might be a good topic for therapy, because some trauma in the past might have caused you to believe that you are not worth your own attention. You ended up with a bleeding heart and that is it. Or, maybe it is not trauma, maybe it is just genetic. Overabundance of empathy.