Relationships with friends and lovers tend to ebb and flow, but when they are truely valued members of your circle, you always go back to them, and they to you. Others whom you may be friendly with, become close friends while there's commonality in your lives, schedules, or situations, then after a time you drift out of each other's lives. Sometimes friendships seem to end, over disagreements, separations, or whatever, and after some separation and quiet, things are reevaluated and people come back together - sometimes it's just over. Be a good person, live as gracefully as possible, and the great friends will always be there, in whatever variations nature works out.