I feel like if my ex-boyfriend kisses another girl or sleeps

I feel like if my ex-boyfriend kisses another girl or sleeps with another girl or even goes out with another girl then he will realize he misses me and will come back to me and i dont think i would care if he did any of those things yea it might hurt a little but if thats what it takes for him to come back then i dont mind being only a little hurt because right now i feel complete broken and lost without him. do you think its stupid for me to wait around for him because im willing to even thou we no longer talk because i told him i still loved him and wanted him back after we were broken up for almost 3 months now we havent talked in 25 days and i dont know what to do? last I new was he hadnt done anything with another girl but he was mad at me because i kissed another guy (we were broken up for over a month). i think he needs to do the same because that made me realize how much i missed him. we were each others first kiss and first love and yea so if you have any advice please help i dont know what im suppose to do? Do i move on or no? Because i try moving on i cant ive kissed four other guys now but none feel the same as his? i dont think i can get over him? HELP!!!