I was getting tired of all my school friends so I decided to go stall them.
Why would you want to do something like that to your friends?
I just don't have time for any of them anymore.
Not wanting to spend time with friends is fine, but what you've done here is very wrong and problematic. You shouldn't knowingly ghost your friends and instead explain to them that you just don't have the time right now do hang out. Why would you want to hurt people's feelings if you cared about them enough to be friends with them in the first place?
I'll tell them that I\'m busy next time when they ask me to do stuff. How is it any of your business?
Simply being honest with them would be the best thing to do. If you no longer feel like hanging out with them, just let them know that. Ghosting them will make you look ignorant.