This may be a little personal and sensitive to some, but I've decided to share it since I'm completely out of options.

So I have this friend; let's call him 'B'. I've known him for 5 or so years. And about 3 years ago, he started to become suicidal. We've had many conversations in which he would tell me about his attempts, and I've said all I can to try and stop him but it obviously hasn't been enough. Just today he texted me "I can't do this anymore. I'm sorry." And this hasn't been the first time he's texted me this, however I still didn't take this lightly. This time he seemed set on his decision to end his life. 

Now he isn't the first person I know who's suicidal. My ex-best friend was suicide and I regret it with all my heart for walking away from her, and not because she was suicidal but for other personal reasons. After B first told me about his suicidal attempts, I was reminded about my ex-bf and I promised not to walk away from him. Every time he tells me he's about to end it, I try to convince him that he has family, friends, even myself, that are willing to listen, but no matter what I say he always has a come back. Says something that'll bring him down as if to convince himself that no one will miss him when he's gone.

Is it bad of me to say that I'm getting tired of hearing him doubt himself? Am I not helping him at all? Am I not trying hard enough? I don't want to walk away from. I don't him to believe that who thinks is the only person that's there for him, is leaving him too. 

What do I do?