Is this cheating

Madison

My boyfriend made a new snapchat that he was trying to hide from me and I’m not sure how to see if he uses it or not because he won’t accept my request, but I had msged the snap account off his real snapchat and the msgs got opened. He’s made accounts before to get girls because I get mad because it’s obviously cheating. Should I leave him over this snapchat account when tho he says it’s not him?