Should i be eating more

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So according of MFP I should be eating over 2200 cal a day but i am lucky if i hit 1500 most days. I keep getting the little message saying i am not eating enough but honestly I am not sure i could if i wanted too. Since starting with MFP back in September I know my apatite has gone down a lot but i want to be sure that i am still doing this in a healthy way.

Any thoughts?