On a break

So recently me and my s/o decided to go on a break. I wasn't very happy about the idea because I didn't think it would make me feel any better what so ever but she said it would make her feel better. I care about her so much so as long as she will feel better I can't argue with being on a break, but it's already effecting me. I can't sleep. I can't eat. I vomit constantly. I feel stressed. I feel lost. She made me the happiest person alive, yes sometimes we had arguments but that never changed how much I loved her. I'm hoping that this break doesn't last long because I don't want to lose someone so dear to me and be lost and unhappy. If anyone has any advice please feel free to share