Welcome to HCM.
Don't worry, most likely your going to be husband will not be able to find out that you had sex before. Hymen
could be torn by sports activity, masturbation
More over you have had no intercourse for nearly 5 yrs., so your vagina will not be gaping and must have regained it's former tightness.
So Don't worry and confidently get married and don't let guilty feeling interfere with your married life. The past is gone and we should not live in the past but be active in our present life and completely forget the past experiences which we do not want to remember.
Wish you a very happy married life.