Life is fast.
[LITERALLY] this may sound cliche, and I still have yet to realize it myself, but it’s so true. If you don’t take initiative of this in a decent amount of time life WILL smack you in the face when you least expect it. It still feels like yesterday being 7 years old, obsessed with Harry Potter (not much has changed there) and not having a care in the world. Responsibilities? What are those?
You will learn who your friends are whether you appreciate the timing or not.
Life doesn’t go on your time, everything happens whether you’re wanting it to or not. People reach different points in their lives at different times; some may go down different paths. Sooner or later you will be able to recognize those that are mere acquaintances and those that are true friends. Get over the whole “keep your friends close, and keep your enemies closer”–it’s seriously not worth your time. It will lead to more struggle than peace.