Roha, I am going to start with the advice I usually give in this situation. If there is the slightest possibility he could find out the truth, be honest with him before the wedding. If someone else might tell him, if you might accidentally say something when your guard is down, if you might talk in your sleep, etc., be honest.
How much of your background does he know? Does he know you had a previous boyfriend? Have you told him anything about that relationship(s)? If you haven't you need to so that he doesn't find out from others or from pictures, e-mails, etc. and accuse you of far worse things than you have actually done.
Have you talked to your husband-to-be about sex and expectations?
If he is extremely traditional and virginity means a lot to him, is there a chance he might want 'proof' before the marriage?
Instead of 'faking' being a virgin, create a search history of looking up 'how to make losing your virginity less painful'. Through your 'research', learn more about hymens and how they are not a good measure of virginity. That many women have broken their hymens long before they ever have sex. Childhood play, climbing trees, riding bikes, riding horses, even falling can 'break' a hymen. Plus some women are born without one. Even those with intact hymens may not have any pain or bleed because some hymens are very thin or stretch instead of breaking/tearing.
'Educate' yourself on ways and techniques to please your new husband. (There are many books about sex. The Kama Sutra is good for than positions.) Being a 'virgin' doesn't mean you have to be 'shy' in bed. This way if your husband questions you, then you can truthfully explain that you wanted to be able to please him. Isn't that the job of a 'good wife'.
I don't recommend starting your marriage off with a lie, but I do understand the risks in being truthful. Be careful no matter what you decide to do.