I once asserted that all girls were evil, especially pretty ones, because of the way they treated me. I think it is wrong to attribute traits of malice to all members of a certain gender simply because they are of that gender. Differing characteristics belong to different individuals. You have concluded that all boys are malicious because one or more boys in particular hurt you. I myself am a boy, and I have yet to find one girl that I am sure will not hurt me. Nevertheless, it is erroneous for me to deem all girls evil for only that reason. Let go of whoever hurt you, and understand that one day the right person will arrive, a person who will not hurt you.
Besides that, I advise you more than anything else to trust in God, because he loves us all, and He has no plans to hurt us. He knew that we were all sinners, and that we all deserved to die. But he loved us enough to become one of us, and to pay the price for our sins on the cross. I'm talking about Jesus Christ. Now He is risen again. If you would just commit yourself to him, there will come a time when you will no longer feel any pain. You will be with Him in his perfect Kingdom.