One of those rare occasions on MN where hopefully it is OK to say "man here".
OP, I can share my experience to see if it helps. About ten years ago I lost my best friend in a fatal accident whilst we sea kayaking together, just the two of us.
I suffered badly with a combination of PTSD, survivor guilt and depression for about 5 years before I took steps to get help. I left it far too long due to a combination of the "big boys don't cry" nonsense and also feeling that I wasn't deserving of sympathy or support when my friend had lost his life and his family had lost a father and husband. I'm not convinced those attitudes are wholly gender specific, though as a very rough stereotype men do tend to be less open with their emotions than women, not just to their friends and loved ones but to themselves too.
I struggled on, hoping that time would heal, but I was getting steadily worse and it was impacting every aspect of my life. I was underperforming at work and I just wasn't fun to be around. I was lying to myself that I was coping and dealing with it and eventually I reached a point where I couldn't hide form the truth anymore so I looked for help. I spoke to my GP who put me on antidepressants but they just turned me into a zombie and I started having suicidal thoughts so I came off them. I accept I should have gone back to my GP as a change of dose or compound might have helped but I didn't. Instead, I engaged with a counsellor that I was able to access through the employee assistance program by work provides.
Having admitted to myself I wasn't coping, I also decided to be open with my friends, work colleagues and family. I've always believed strongly that we need to get rid of the terrible stigma associated with mental health and I applied that to myself. It made a great difference. Everybody was supportive and empathetic, everybody. I got no sense of being judged negatively or looked down on and it was actually extremely liberating. As to the counselling, it was life changing. I only needed about ten sessions but the difference in me before and after was like night and day. That's from somebody that would have previously considered talking therapies as a load of nonsense and not something for me. I'm now, due to my own experience, a very strong advocate of them.
IMO being a real man is not about stiff upper lip, fighting off attacking barbarians or being the defender of the castle. That's all outdated macho bullshit that holds too many men back in life. Being a man is about being a human being. Being empathetic, caring, considerate and accepting that we are not always right nor are we the leader of our pack. For me, that mindset demonstrates real strength.
I stepped up and addressed my problems not so much for me but for my wife, my children and my friends. My only regret is that it took me so long to see through the bullshit I had subconsciously bought into about what being a strong man really means.