Hello there,
I'm sorry to hear that you are feeling down about this whole situation of yours. Since you miss this guy you used to talk to on Xbox and now you have no way of contacting him, could this be the reason why you have been feeling depressed and almost sleepless? If this is the case, then maybe there's nothing you can really do to contact him, unless you get on Xbox and somehow find him again. Can you talk to anyone in your family about this, or maybe a friend in school you can talk to? It's always best to confide with family and friends, but if you feel that there's no friends or family member you can talk to, it may be best to call a hotline phone number. Here's a link to the hotline phone numbers here on TeenHelp:
http://www.teenhelp.org/hotlines/
I hope that whatever it is that's making you feel this way, I hope it doesn't impede you from enjoying your day. I wish you all the best that your situation improve, and should you want to talk to me, you are more than welcome to through
VM/
PM. Take care of yourself.
Mark