that's a whole lot. and the fact that i get jealous that my girlfriend has had only 3 sexual partners before me (check the "can't get over my girlfriend's past" at relationship). I had a hard time coping up with her past. Yet, these happened when I wasn't a part of her life yet. And now, it doesn't bother me a bit.
I feel that the past molded you into who you are by now. Your guy should be happy with what you've done before, for if not, you wouldn't be you now. But, i must warn you, it'll be devastating if your soon-to-be husband will find out the truth. 100 is a big number. When he does find out, he will think that you are promiscuous. that's what i felt and i think it will be the same reaction of your fiance.
If he does find out, assure him that he's the only love of your life, that the mistakes before has nothing to do with him. I'm sure your husband will understandand wouldn't be tying the knot with you if he doesn't care and love you.