My Heart Hurts in My life in a nutshell

Sometimes the worst things happen to the best of people. One of my great friends… We will call him B. Well my heart hurts for him.. Hurts big time and I don’t know how to help. If if wasn’t for me being up until after 4am to calm him and talk him down he would have taken a lethal dose of dope last night. I have never in my life pushed myself to stay up to make sure someone was ok… And I made myself go physically see him and see that he was alright… It scared the living hell out of me and breaks my heart that B thinks that is the only way out. I told him I would gladly be his little ray of sunshine thru the rain of this thing we call life to make sure he is ok. I had NO idea he was trying to do things of this nature to himself. I know that he has in fact been depressed and I know he has a hard time coping… I knew that he smoked pot but never did I ever think he was doing anything harder than that. My heart hurts so badly for him. The only thing that gives me a small glimmer of hope is that he called me like he said he would when he felt like just letting go… I wish that I could make him feel better I wish that it wasn’t so hard for him and that I could do more than just be there. I wish I could bring his mother back. I wish that I could bring his daughter back. I wish that I could make his pain and suffering just disappear and that he would be the bubbly person I met almost a year ago. It hurts because he is a good person and because he doesn’t deserve to feel the way he is feeling. He does have his demons hell we all do but it sucks because I don’t know how to help him… I don’t know how to fix things. I am just so proud of him because he did pick up the phone and call me and ask for help like he promised he would if it ever got that bad. I am proud of the fact he was able to tell me what was wrong and I am proud to call him my friend. It just truly hurts because I hate seeing people I care about hurt and not be able to help them. I feel exhausted because I was up till after 4am and had to get up at 5:30 but I am forever grateful that my friend is still here and is living to fight another day. He is quite amazing and I just hope that he continues to make good on his promise of calling if he ever needs me.. I can’t take losing another friend and feeling responsible for it like I did so many years ago when I lost another friend in a different situation… Any advice as to how I can help or help him cope or even just stick to his word?