Boyfriend found my old sex tape...

Ok I made this over a year ago and I didn't know it synched up to Google pictures? He borrows my laptop for work and I never log out of anything because I have nothing to hide(aside from that, I didn't know it was there! I would've deleted it once we started dating!). It was basically just me giving my ex a hand job.. me and my current Bf live together and we've been dating since Feb.14th. Messing around since Sept.13th. And this tape was made in June.2015. How do I address this issue? It was the past and I can't change that. I've seen his ex's nudes including other girls but that's all from before we were together and he didn't remember he had them until I found them. I was understanding and just laughed it off. But he's taking it pretty hard, and short of being rude saying "its none of your business" or something... what do I do? I cried all night and I feel horrible he had to see that.