How do you find that special someone when you've lost all hope?

ive been in love before but it didnt work out and it was mostly my fault and i dnt think i really love him anymore i maybe just sprung and i feel kind of bad cuz hes happy with his new gf when that shuld be me so how do u make new when u have to see this guy everyday at school and be remindeed of the past and feel like ur heart has been ripped from ur chest.