We're still friends and were casually wondering if the other had hooked up with anyone since. He said no, thinking it would upset me, but then he later came out and said he had. I was more upset about him lying about it since it made me wonder what else he's lied about! He said it was only because it's private info I no longer have a right to know, and I shouldn't have really been asking in the first place. He also said he was always honest with me throughout our relationship. Should I believe him?