Coming out to make him come out

Hi. This is a long story but I'll try to keep it short. I used to work with this guy, some 3 years older than me, and we became really close. I started to notice all our opinions and attitudes toward life and other stuff in general were eerily similar… but we were still only friends and I didn't really think about it much. Fast forward to Christmas, and our office was going to play Secret Santa. I ended up having to buy a gift for him, so when I went to scout about gift ideas in his room, he seemed really interested in some items from a geek store. Hours later, I went to look for something to buy him, but couldn't remember the store name. So I had the "wonderful" idea to look at his browser history after everyone left the office. I stayed late, went to his room, turned on his computer and checked the history. Turns out he had Chrome syncing turned on and didn't use private browsing because the first items to appear were being added "live" to his history from his home computer… and to my total shock it was gay porn. Some straight porn, and tons of gay porn. I was so shocked that I completely forgot to search for the geek store's address. I couldn't stop thinking about it. I soon realized everything made sense… my mind started jumping to conclusions: he's probably a closeted gay or bi, just like me. That's why we're so like-minded… because we're more like each other than we know.The company where we worked ended up closing, but we remain close friends and still occasionally work with each other (freelancing). I consider him a good friend and I can tell he has a particular regard for me… not weirdly though, I started to develop a strong crush on him after my discoveries. I started to picture us together… Recently I went snooping around his notebook when he was using the bathroom (go ahead, judge me) and saw that he continues to access both gay and straight porn (but much more gay porn).There one twist though: he has a longtime girlfriend and lives with her. But I've being toying with this crazy idea to come out to him in the hopes that he'll come out to me. But I could just end up freaking him out, although I doubt he'll try to "expose" me. I wouldn't say that I know about his gay porn browsing history, but thought of mentioning something about how I identify so much with him etc etc. Or maybe I could tell the story about how I went to search for that store and accidentally saw everything else.What you guys think: come out and try to hit on him… or keep pretending there's nothing else to this story?