I have my own term for this in Swedish that I can't really translate adequately, but it would be something like "social sickness". You're suffering from withdrawal symtons from prolonged exposure to intense social interactions that you are now dependent on. And you have two close friends, thats more than a lot of people have! I have one person I can call my friend who lives two hours away, and I'm damned content on my own and in his company (which is 2-3 times a year). I also live on my own and I cherish that freedom it gives me. So grow a pair and suck it up, you'll get used to it eventually. Watch movies, listen to music, talk with your friends on the phone (more stimulating than chatting), knit etc and you'll be occupied.