Need advice

To you woman who have had a break up or divorce after a long term relationship with the man you love and can't make a life with him by you can't no more stay you've tried to make it work but can't get on the same page no more .. it's hard cuz we love each other but I'm no longer happy and he's no longer happy.. i feel like I'm dying without him like he's my reason for being alive but yet I want to just walk away .. how did you survive ?how did you adjust ? I know time heals but every minute feels like hours without him 😭😭I feel I'll die of sadness