I cheated on my boyfriend and he holds expectations of me for my actions but won t tell me what they are!?

I have cheated on my boyfriends of 6-8 months, our situation has always been fairly complicated in my eyes, I basically repetivaly became intimate with my co-worker whom I had previously had a crush on before
My current/X boyfriend. That s beside the point, we never have vaginal or oral sex, but I did allow anal Sex though he didn t "finish." That was only one time. To make things worse I repetivaly lied to him about seeing another man and allowed him to take me out on a 100 dollar date. This co-worker has a girlfriend of 5 years by the way... My X says that I should have already done some things to prove myself to him and my character, I don t know what these things could be and he won t tell me because it wouldn t be genuine and would be meaningless.
I discovered that one of them was inform the co-workers girlfriend of the affair... Which in not sure I can do... Any other ideas of what he could possibly be expecting other than an apology? Could it be a reimbursement for the dinner?