Me and my husband got married in august 2010, And I will admit I knew about his promiscuous past but I took it?

for what it was because I loved him, He cheated alot the first two years of us dating and I still stayed with him and finally he slowed down and wanted to just be with me and only me and recently I found a black book with at least 100 names of men and women he has slept with since 03 stating if it was four play or just beside their name even include their height and weight BUT NOTHING IN THE BOOK WAS DATED WHEN WE WAS TOGETHER BUT the book threw me off guard, KEEP IN MIND WERE A GAY COUPLE, IM 25 HES 30, HOW SHOULD I FEEL ABOUt THAT, THIS MAN HAS HAD OVER 100 PARNTERS THAT I KNOW ABOUT