How long does it take

To get over a breakup? I honestly feel like I'd rather die. The pain I'm feeling is unbearable, I cant concentrate on anything, cant eat, all I want to do is sleep so I can forget. Then I wake up so depressed and cant stop crying. It's the feeling of rejection, how do I deal with the fact that my partner of 7 years has changed? He says he loves me but what does that even mean if he doesn't want me 💔