help me!!

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okay.. i dont know what to do.. the guy im dating says he like me and everything and acts like it but then i went to his profile and there is a girl that has girlfriend by her name for family.. and i dont know if thats from the past or like now.. and i really like him but i dont know what to do.. should i dump him and h if its true?..or what? i need help.. and if this help every guy i dated has cheated on me.. is it me or the guys??? ohh and her name also has crush...