Grasping For Normalcy

This is my first time here. I joined this support group because I have become aware that grief has taken hold of my life and I no longer am functioning in a sane manner. I am going to counseling and catching up on physician visits and trying to be productive. But the sadness is overbearing.
   My life became  a series of going from one loss to another in the last three years. First I lost a dear friend unexpectedly. In the same year, my best friend got cancer and passed away six months later. Three months after her passing, my mother was diagnosed with stage 4 breast cancer. She passed away last January. Another close friend of mine has been sick for two years and now is on a ventilator. And to top it off, I lost the love of my life through separation this last week. He had become not only my best friend, but my support and comfort. I don't know how to handle all of this any more.
   So here I am, searching for understanding and support and ideas on how to cope and regain my strength and sanity. And hopefully I can be of some comfort to others here as well.