Confused and need advice!

My fiance and I have been together for almost 3 years. For the past couple of months he's had trouble...finishing up business in bed. Which of course makes me feel terrible about myself...and then I found porn on his phone. Not only straight porn but gay porn. At first when I confronted him he lied, but after awhile he admitted that he was curious and sometimes wondered if he's interested in men...what should I do? I know he loves me, he's a great fiance and tries to give me the world, and I love him too...but I don't know how to get thru this...I told him I wanted to take a break so we could both think things thru...any advice?? Anything would help :(