Feeling Lonely

I have heard people who have many friends say they feel alone. I know what they mean. I have a bunch of friends, but no 'best friend'. No friend who I can call in the middle of the night. No one who comes over to hang out. No one, who if I needed something I could always count on. It's depressing me. I had a really bad day today and all I could do was cry. I had no one to call, no one to go to. It just made me feel so alone.