how to keep secret that um nt a virgin?

I don't know your husband, so i can not tell you how he would react, only you would know that. But on the other hand, why tell him? He won't know the difference. When some women loose their virginity, they don't bleed nor do they feel pain.
That is your call. Either tell him and get the monkey off your back or carry on as usual and don't say anything.
Is this your future husband or have you already married. If your married, you obviously consumated that, right? Any problems or comments from him? If not, no big deal. If you preparing to get married, don't bring it up till he does, then use your judgement.

Mrs. Voot
Is this a religionist marriage?
It is not a good idea to have secerts in marriages.
but you are old enough to have had a relationship in the past, then that is part of a deal he will have to think has happen with you, as you think has happened with him.
RT

If he asks tell him that you had been in a relationship if he never asks then hes just happy not knowing.