How to tell if my ex boyfriend wants me back?

im 11 in 6th grade) Ok today my ex boyfriends friend asked me did i want to go back out with him(my ex) and i said yes i did and then i said why did he ask and he said because his friend(my ex) wanted to know so . what does he ( my ex) mean. so how will i know for sure if my ex wants to go out with me agian

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