I can't do this

I can't deal with my breakup. It's still very early days, 10 days in fact. I love him so much! You really don't know what you've got until its gone! We still have contact and are due to go away together for a vacation which was planned months ago. He still wants to come to that, he said he will always love me and that he's obviously hurting. And I'm going through a tough time at the moment with a family issue, today he held me while I cried. But if I message him to say I miss him I get no reply, and I know I shouldn't but I message him sometimes to tell him I love him, and get no reply. I've even been to see my doctor and been put on antidepressants. I feel sick and shaky all the time, I have a constant feeling of dread in the pit of my stomach and I feel so alone even though I have people around me. I put on a brave face but I just want him! Or I want to just sit on my own and not face anyone. I've lost 7 pounds in the last 10 days, I have no appetite. This app has been the only kind of comfort so far because I come on here and try to find people going through similar as me and see how they deal with it. This hurts so bad. The reason we split was because we were arguing a lot about minor things, but at the same time it just built up and we were both stressed. There are no other people involved. I honestly don't think I can get over this. I don't even want to get over it