I may have an eating disorder?

I am 31 5ft1 I am 98 pounds. Recently going through a hard relationship. I feel so alone and hurt. I cry all day and not much od anything makes me happy. I am fixated on making things work with him but meanwhile I can't eat much. I try but I just can't I get sad when I think about food most times. I am not sure why but I get like a feeling of guilt. When we were happy I didn't have this. I weighed 140 when we met. I just love him so much and I dont know why food came into the equation. People are starting to talk. Everyone tells me to "eat". I do eat but I also do relate it to sadness of this relationship problems.I dont know what is going on with me. I dont like the way it looks at all. his lady in the mall said i looked anorexic to her friend today when I walked by. People at church have asked the same thing. I am not sure what to do. I just want to honestly cry all day and night. I never thought my boyfriend would treat me like this and not be there for me.