Worried about my friend

My friend told me they planned to kill themselves soon but the date has passed and they have gotten better, but work has been effecting them poorly. I have been trying to recommend them to quit their job, or seek professional help, or anything else but, I’m worried it’s not enough. I wish I could be there for them irl but I can’t due to living in different sides of the world. They say they will quit in August but I still worry about them. I try and give them advice but they just can’t get over the fact they will have to go to work tomorrow and its eating me up inside because I don’t want to lose them but I don’t know what I else I can do to help…