How to forget someone thats mean to you?

Stop talking to them, ignore any messages, cut out everything that reminds you of them; and find someone else to fill the gap; like a really close friend, or a new one.

Easy. Just totally erase them from your life. If you hear a song or see a tv show that reminds you of them, switch it off. Get rid of everything that reminds you of them. Delete their number and ignore messages and delete them on facebook or whatever. If you see them daily, don't look at them, just forget about them. If they gave you so much to remember, then it will be harder, but if you really want to forget about them, just try