Suicide... Why?

A friend of mine took his life last week. And I just don't get it. I guess I should be glad for that. I'm not in the frame of mind to get it.
I was upset by this. But the more I thought about it, the more it bothered me. I first felt shocked. Then I felt disbelief. Like it's not so. His phone number is still in my phone. We had made plans to work together. It can't be real. Then I felt mad, no pissed. How could he do this? How could he do this to his family? I believe this happened because he lost his brother to heart problems a few months back. So I was thinking of his mother. She just lost a son a few months ago, then to lose another. And her husband is sick with cancer. Which could have played a part in his decision to do this. I didn't cry when I found out, and still haven't. But when I would look at Marsel and Adrian and think about his mother, then I felt like crying. It was tearing me up. I slept like crap that night.
Now I'm better. I feel stupid saying that. Like this was about me. What I mean is that I'm not looking at the boys and thinking things that hurt a mom.
I don't know if what I feel is "right" when it comes to something like suicide, but it makes me mad. (I guess feelings aren't right or wrong, they just are.) I wasn't walking in his shoes, but why couldn't he ask for help. Like from a doctor? He had to know he was hurting, why didn't he just ask for help? He could have still be alive this week.
Your family is in my thoughts, Daniel. I'm mad at you right now, but that will pass.