I'm a teacher and when I'm on longer school holidays I sometimes just stay home and after a while I start to feel very down and I get stuck in kind of a rut. Perhaps try going for a run, go fishing. If you enjoy traveling, plan a trip and the weeks up until your trip will be a lot easier to get through. I should be saying "live for today" but I really think if you have things to look forward to in the future then you'll feel better.
I understand when you mention writing down your inner most thoughts. I also know no other way but to lay a lot of it out there, it's just an honesty thing and if that's who you are then that's cool. Nothing wrong. Perhaps you're craving that connection with people because you're home so much. You can also connect with people on topics you're passionate about.
All in all, I think you just need to get out and do something for you. I'm sorry you're having a rough time. It will pass. But just get out a little! :-)