[header] How to find out if your boyfriend is cheating on you (for girls ) [title] See if his looks have changed. [step] Your man's appearance can say a lot about whether or not he's cheating. If he didn't care much about his appearance before, but now spends more time grooming than you do, then something is up. 
He may be improving or changing his looks to please his side piece. Here are some signs that he's grooming for someone else : [substeps] If he used to be scruffy before, but he's always shaving.