if you have a phone go on facebook there or on ur mates phone or this is how to unblock a site. Go on internet and type in facebook.com then when the page loads theres this icon that is on the bottom right hand corner on the internet page which looks like a locker and an arrow. click on the arrow going down and then click on off but remember to put it back on block when you've finsihed using facebook or your mum might find out you've gone on facebook and then that means trouble and also delete the history by going on favourite, history and then clcik on something you want to delete. Hope this helped. Good luck Ive done it before. It felt evil lol hope it works