Is this normal..or do i have some kind of psychological issue??!

Is this normal..or do i have some kind of psychological issue??

so basically (i'm 15) i don't think i'm depressed really but i just don't really enjoy hang out w/ my friends anymore so i've stopped any sort of communications between us. most of them are away on vacation so i can only talk to them online (through myspace/email/AIM etc) but i just don't bother. i see them online but i go invisible or something of that sort. i used to LOVE talking to them online and now i just like being alone (but i am closer w/ my family..strange..) is this normal? nothing has happened btween my friends and i that would cause friction btw. and i am really friendly to people in my camp..:/

Your fine. You just haven't seen them in awhile so the urge to talk to them all the time isn't there. Once you guys get around eachother again, it will possibly change.
I do the same thing when I see some of my friends online that talk too much, I go invisible!!