From some research that I did a while back about some men's groups (not the MRA sort, but the actually supportive kind) these do exist, but it needs to become a lot more normalized and mainstream in order for the culture to shift toward men having more support and being encouraged to be more vulnerable with each other.

https://medium.com/inside-of-elle-beau/its-ok-for-men-to-talk-about-loneliness-7a6287bf588f

"Get more comfortable with talking to your male friends about what is really going on for you. If you can afford it, work with a therapist or life coach. Seek out healthy communities of men who are committed to supporting each other or start your own.

When Scott Shepherd came to the conclusion that he was relying too heavily on the women in his life to be his emotional support system, he downloaded a Men’s Group Manual and invited a few of his friends to join him.

At first, Shepherd thought his men’s group would be a place to unload on someone other than a woman, but it’s become more than that — something he believes all men truly want and need, but can’t admit it. “In our culture, men have always found ways to be near each other, but it’s never been centered around feelings,” he explains. “Men are taught the remedy to heartbreak is to get drunk with your buddies, objectify women, and go out and get laid; to basically distance yourself from your feelings and channel them into an aggressive outlet. We use sports as an excuse to bump up against each other, so desperate we are for human touch and intimacy. But this kind of closeness is based in camaraderie and aggression, not vulnerability and trust. The former is very surface level and not nearly as satisfying as the latter.” (Harper’s Bazaar)

Loneliness is a real issue of modern life, one that has many detrimental physical and mental health impacts. Men’s loneliness matters, as does everyone else’s struggles with that. It is absolutely appropriate to note that and to talk about the ways that it can affect men, in ways that are particular to them. What is not appropriate is to demand that this problem be a priority for women and to throw a tantrum when they decline to do that.

As another woman says about her husband’s men’s group, “This isn’t him going to grab a beer with guys. He’s going to find psychological and emotional support from men who understand his problems,” Liz explains. “They’re not just getting together to have a bitch fest, gossip, or complain about their lives. They’re super intentional about what they’re talking about, why, and what’s important to them.”