My boyfriend has depression and its been good for the past year until recently, some things happened to him that I wont talk about because privacy. 

He told me he was feeling suicidal yesterday and that he was considering ending it. He told me that those feelings are gone now, but I'm still worried about him. What if he cant handle it and suddenly does it? Or he's lying so I dont feel worried? Usually he keeps negative thoughts to himself. He's so burnt out from school and work and other things. He has chronic insomnia as well so I'm worried about his mental and physical health. 

I'm not suicidal or have depression so I'm not sure what to do. I sent him messages reassuring him, telling him that if he needs space or someone to talk to that im here and he doesnt have to feel bad about it. I still feel like it isnt enough and I'm super worried about him. Is there anything I can do to help him?