Woah, there! What’s really going on here?
He’s mad because you slept with someone BEFORE you started dating him? And you’re buying into this?? 😯 There is NO infidelity here. Just an immature guy who is going to have problems with whomever he is with — you or some other woman — if he thinks that he can date a 27 year old woman who has no dating past.
That you’re buying into this dynamic is of more concern than his unrealistic expectations and behavior. It would help to know how soon after dating him you moved in together, because I think it may have been premature. This guy isn’t right for you, and your feelings and your need to write me for advice are confirming that for you. (Listen to your own instincts!)
You need a more mature man who understands that people bring life experience to the table — and that there is a lot of wisdom in life experience, not just mistakes made.
Find someone better for yourself. (It won’t be that hard! 🙂 )