Bf searches gay groups and trans porn ?

I just found my bf of 8 years reddit search history and it was allllll gay forums and transgender porn: he shrugged it off like it was nothing and denied saying he was straight. and we have since broke up. I went into a deeper dive and think he posted his junk in a gay men group, and has commented on other gay men’s things, is he bi? Also to add we never ever had sex. How do I get him to tell me his secret in full ? I would love to support him, but I think he could have been pursuing women too? Advice please ! I can’t not know whatever he has clearly been hiding from me for years .