There's a lot of people out there like what you are describing. I am a mature person and still have to deal with these sorts of people. I have so called friends that only socialize when there is nothing better in the diaries. I don't consider them to be friends at all, they are merely acquaintances and enjoyable company at that level and nothing more. Take them for what they are and don't worry too much. Good friends are hard to find and most people do not have more than a handful of them. I am confident that you will find some true friends. Congratulations on having the insight to see the situation for what it is. That is amazing and a gift that will serve you well in your life. All the best x