So i was with my ex for about six months. towards the end i got very suspicious that he was cheating and ended it. that same day he went out partying with that girl. him and i have mutual friends and i was told they are still sleeping together to this day (a month later). he recently followed me on all social media and added me back on snapchat. then randomly yesterday he was drinking and messaged me a long paragraph saying that girl is his cousin? she clearly isn't, does he think i'm an idiot? he said they never slept together and he didn't tell me she was his cousin because he wanted me to trust him. but he really liked me and didn't mean to fuck us up. bullshit!!! he's 24 does he think i'm stupid? why in the heck would he send me this?