The feeling of being utterly alone is horrible -- especially when you are feeling so weak that you can't lift up your head enough to see those around you, nor can you look deep enough within to see the wonderful, special creation that you are.
I often feel alone, but it is usually better when I try to reach out. After a rejection, though, sometimes it's too scary to take the chance.
Give yourself some time to recover from this latest rejection. And do nice things for you. We need nurturing when we are not well, but sometimes we have to nurture ourselves...