Look at them and hope they can read your mind........... wtf
by ignoring him/her
Defecate while in his company, in public. I promise you won't need to say a thing and I guarantee you won't have to see him ever again.
Don't call or message for about 6 months and they should eventually get the idea. xP
You can be like my ex and not talk to him and never acknowledge or hang out with him anymore and just be distant. Even when you ask if your breaking up just say no and continue to not be with said person.
send a text message. seems that's how teenagers communicate these days. lol. whatever happened to real dating & talking face to face ??? O.o