Hey Naked (cute name, has a certain ring about it!) this is a situation that many of us face at some time or another. A few years ago I was in a similar situation. I felt I had lost everyone who was ever important to me. Indeed I have lost the ones I have loved the most.
For the first few years I felt very empty. Overtime, something very unexpected happened. Even though I had physically lost the ones I loved the most, I did not feel totally alone, and felt that they were still with me as part of my deepest being. They are the people who have clearly made me who I am, and who have made me the person I am now.
These days I feel that I am only the sum of the love that has been given to me. Somehow after emerging from some years of numbness I have found some friends who have proved to be loyal and caring beyond my expectation Once I started to reach out, because I had no choice, they came into my life.
I'm not sure if I will love in the way that I have in the past, but I feel that it would be wrong be closed to what life has to offer. My life is full and enriching, and I have some truly great friends.
When you say you don't want to get close to someone I think that means that you are feeling deep pain and feel that anymore pain will be unbearable. I feel that one day you will be more open to other people but that it will happen when you are ready.
I have found that everyone grieves in their own way, and in their own time. I hope that from the responses here you can see you are not alone and that there is a lot of empathy, and support for you.