You're 20 now, and yes, you probably are changing. I know when I was between the ages of 20-22, I changed a lot. I met new friends, and the other ones just kind of faded out. I still saw them every once in awhile, but it seemed when we got together, it wasn't as much fun as it used to be, so I searched out for something new and different.

Maybe the same is happening with you. It's like, you have a favourite CD that you play everyday and can't get enough of. Then it's more like twice a week, then once a week, then eventually, you get bored of it and want something different and exciting. The same go with friends. You see the same thing day in and day out, and over time, it kind of gets stale, you know.

All I know is that out of all the friends I had in junior high and high school, I only keep in touch with one. All my other friends, got boring as they just liked to get drunk, all the time.