im sorry that you feel this way, but i can totally empathize with this feeling. this happens all the time. a good friend of mine tried to describe this feeling to me and helped me understand why this happens. she said thats because we must accept the fact that Everybody comes for a certain period in our lives. she said we just have to accept that thats the way it is. but i still find it difficult to let people go who i love so dearly and want them to stay. i have tried to console myself by thinking that may be they are No more NEEDED in my life...but that still make me feel better sometimes.
just want you to know that you're not alone in feeling like this.