Apologies in advance for the long story!

I live a straight life, just get the urge to stroke with a bud once in a while lol but have never told anyone. My childhood best friend moved to my area a couple months ago (lost touch during college, reached out after a big breakup) and we’ve been hanging out more often. He is straight (at least I thought) and while we’ve always discussed sex and women openly we’ve never really talked about jacking off and the like in enough detail to really spark anything. We were drunk during one of our hangouts and while scrolling through this phone to look for something he needed me to find for him I came across some dick pics and screenshot of secret accounts (Fetlife, Reddit) that he’d use to hook up and stuff, nothing abnormal. Although, he does have a huge dick. I didn’t saying anything about it to him but I was curious so the next day I found his accounts and looked through his posts and found some pretty hot content of his (solo vids, vids with woman, dick pics), all straight. There were some references to MMF experiences but it was mostly just him looking for couples he could join as a bull, no real indication that he’d be interested in guy on guy stuff. Time passed and I’d occasionally check out his accounts but eventually he deleted everything and started dating again. More than a year after he deletes all his sex accounts, I’m casually just looking through sniffies when I come across a profile with a pic that looks familiar- one of his dick pics that I had seen him post on his accounts. The anon profile listed him as “straight curious” with stats that matched his, except for age. I (with an anon profile) tried to message the account but got no response. I found that he was going to join a group at an anon gloryhole session, but I was at work and couldn’t make it out in time. This all happened last week and I don’t really know how to proceed. This guy is one of my closets, most trusted friends and I certainly don’t want him to judge me or ruin the relationship that we have. He also knows my gf, and while I know that he’d keep anything related to this between us and I trust him, I don’t know how he’d react at me looking for this type of interaction when I have a girl (his ex cheated on him so I don’t know if he’d be sensitive to this). Although, if he was on sniffies looking to bust a nut, I’m sure he’d understand.

I’ve been looking for a jerk bud for years and have been unsuccessful. And when I was younger, I always wanted to jack off with him and compare dicks, but we just never got the chance. I’ve also now seen this part of him that he doesn’t know that I know about (although the content was posted publicly on the internet, and he he has told me about his fetlife hookups), I’m not sure how he’d feel about me essentially stalking his accounts lol. He’d probably take it as a compliment but who knows. I’m also not really certain that he’d be interested in jerking together; I assume that someone who’d post a wide variety of sexual content on the internet would at least be open to it though. Overall, this guy would’ve been my natural choice for a jerk bud, as children and even now, but I don’t know if the potential value in gaining a jerk bud is worth the risk of this wrecking our relationship as it is, which I do value a lot. Thanks in advance for your thoughts!