Answer:
Slowly start to hang out with other friends and they will get the message that you don't really want to hang otu with them! Or you could always fake a fight that they will think is real... the only problem with this is you guys might get back together after this cool down. But you can always refuse to be their friends after. Or you could say "I can't hang out with you guys anymore!" they will ask why and you say "I am not supposed to tell you why." or just tell them your parents want you to make new friends!
I hope this helps and that things work out the way you want with your friends!