it's difficult to lose such good friends. sometimes as we mature ppl just move on. sounds strange about your friend but repect whatever is. she's doing other things and for whatever reason it's not working out with you two. i know it's like losing an arm or somthin' but reach out to others and new ppl will come into your life. stay busy too. less time to muddle over it. get involved with new things...join a hiking group or whatever with ppl with similar intersts as yours. when i was your age i remember this happening to me too. just be reassured new wonderful ppl will come into your life. some may remain forever. some may not. know you feel lonely so get cracking to make those new friends.