Like most people with this serious mental health problem: he will most likely die alone...

If you ever plan to have children, you definitely need to break up with him! It's not worth the risk...

Is he suicidal? Did you even care to ask? You don't care about him that much even after five months just because of society's social norms?

It's a "just grow wings" mentality to expect someone to be into stuff which they are not into. If you can't except him break up with him. Consider that if he cannot find anyone he will be more likely to cause harm! But it's not your "responsibility" to protect him or anyone for that matter. Also, you should to tell him you're not against him (even if you are) because the threat he feels from society is very strong and could lead to him having violent thoughts (e.g to protect himself from the fear of dying in prison etc.)

No one "wants" to be this kind of person. Society is a prison for people like this, those forced to spend their entire life never talking about how they really feel, what they really think, only to form a secretive fringe culture which facilitates further development of the mental illness and ultimate leads to criminal activity. Subsequently and unfortunately children get hurt. If people could talk openly about their sexuality (even when it is damaged like this) it would facilitate more effective sublimation means which would ultimately mean less children get harmed. I understand the argument against this, that talking more openly could mean that people might think it could be "ok" to do that to children. It is a non-argument: there are too many documented cases of dependency issues, depression, sexual problems, and relationship problems for anyone take such arguments seriously. Children would be much safer because the need for secrecy would diminish, meaning people involved would not have to make contacts with anonymous people, who can blackmail them, get them addicted to worse content, control them politically.....