I think EVERY mom has experienced this to some degree. You just get to where you're in different places in your lives. Responsibilities, goals and ideas of what's important change as we get older.
@libra2extra92 not many people can deal with being around someone who has responsibilities to that magnitude, the person can be selfish, the person feels like they can't relate to you anymore because they don't have kids, they feel you're too busy, it's a variety of things and it depends on the person. Some friends say they'll be there but end up eventually just distancing themselves. There are some good ones but a child really does show you who is and isn't going to be there.