What should i do, go back with him or stay single?

i need advice! i just broke up with my boyfriend because i thought we should be friends cuz at the time thats all i felt we were. now its a week later from the break up and i think i'm startin to get a huge crush on him again. he's all i think about. we already have broken up once. should i tell him i like him again? i dont know if i should cuz the other day i went over to his house, cuz is sis and i r friends, he didnt even look at me... i miss him and i want to get back together but i dont know if i should and if its the right thing to do... please i need help! should i stay away or get closer? what if he doesnt want to be together. what should i do?!?! help !