No appetite

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I am having an issue with a friend. She has ended our friendship completely. I am very upset about this and therefore have not had an appetite. I try to eat, but have to force food down and sometimes that just isn't possible.

I don't know how to move on from this. I am so upset. My stomach is in constant knots.

Because I'm not eating it has been hard to workout. Today it's beautiful out and I would love to go for a run outside, but since I haven't really eaten I know that's not a good idea.

Any ideas on how to move on? Thanks for advice.