I need immediate help (May be a long Post)

Ok so me and a guy decided that both of us recently getting divorced would benefit just being friends with benefits.. We admit we like each other but there are so many reasons that it just isn't the right time for a serious thing.. So the other night he was drink telling me he really likes me blah blah blah and that I should get away from him since I'm to good for him.. Of course I tell him no I like him and I like having fun so quit putting him self down and things were good again. Woke up watched football game took a nap... Then BAM! a knock at the door and it was her... The ex wife and she went CRAZY! She found a bat Broke casserole dishes, dinner trays, cups, ECT... Telling me to get out of her home... Turns out about a month ago (before him and I went started our fun) he told her he wanted to try again evidently she thought they were going to move back with one another and be a happy family again.. I'm so furious/hurt/lost on how to feel! I asked him specifically if him and her were completely gone and no feelings we present for her before I entered into this thing..I feel like I'm a home wrecker and that I was lied to.. IDK what to do at this point.. Turns out my feelings for him are there maybe a little too much but I try and tell him that it hurts me he lied to me she it makes me feel horrible but he just shrugs it off and days she's lying he never told her that...ADVISE????