Yes, I believe they do. However, most of the friends I had in teen years I no longer have. The said part is I'm just 22. Some will hurt you, most forget you, and a small amount will stick with you. As for social networking, unless you are starting a business or advertising its just entertainment. Every few years the most popular social network will change. First, it was myspace which went out. Next, Facebook,Twitter,Instagram then Vine. The only thing the will always be trending is education/job. Money is something you will need to do fun things like movies/clubs etc etc.