Is it normal to grow apart after high school and college years?

Yes, it is absolutely normal for friends to part ways after these years. We simply are growing up, developing other interests and going our separate ways. Some fiends get married and have children and often find new friends that they have more in common with. Sometimes when we move to new locations, it is difficult to make a friendship work if both parties don't put forth interest and work. I have been in your shoes. I have moved away on 2 occasions. 1 to go to college and 2, to return to college and am now living in my college city away from my hometown. On op of of that, I got ill, am unmarried with no children while most of my former friends are married and still live either in my home town or in another state. We simply grew apart. Although it can be sad at first, it is a natural, normal part of life and sometimes those people are meant to be in our lives for only a season. It is healthily and ideal to try to meet new people, gain new friendships with similar interests and they can meet you where you are in life.