Having just come out of a relationship, I know what it feels like. It feels like this special person took a piece of you, and threw it away (cheesy I know :/) But I have a couple of tips that will hopefully help. Here goes:
DON’T listen to sad songs that have anything to do with break ups or love, it’ll only make you feel worse.
DO tell your closest friends about it. They will know how to cheer you up and make you laugh. They will know how important he/she was to you, and know to not bring him up. Everything you feel, tell them, because venting does help.
DON’T tell others how you feel at school. Most likely they won’t realise that it’s not to be told, and will spread it around the school like wildfire, meaning he/she will know how much the break up has affected you.
DO say that you can be friends, if they ask. If not, it will just mean that they start to get feelings for you, but not good ones. Or if being friends doesn’t work for you, be clear that you aren’t friends, but you are mutual.
There are other things you can do to make it less difficult, but this should be the start of an easier road out of the dumps. If your needing anymore tips, ask friends. Anything they can say will help you (hopefully!) and it will be better.
Oh and Relationships come and go, but friends stay, so never leave your friends for a boy/girl.
A Teenager's Years 