I need all the advice i can get-honest replys please!!?

to make a long story short-i am in a relationship for almost 4years-we have a daughter together-before we had our daughter-i had a wonderful paying job-i had my own condo, i was 60 pounds lighter, i took care of myself, i wore makeup and did my hair-and wore dresses-basically i was outgoing,out and about-now since we settled down-im 50 pounds overweight-im lazy in bed-i dont do my hair or makeup-i wear baggy sweats and baggy shirts-i dont go out and do anything-i stay home and take care of my daughter-i went from glam to frumpy stay at home mom- well my fiance seems disgusted by me-we barely have -i dont think hes attracted to me-and he rarely talks to me-he doesnt show affection-at all-we havent kissed for over a year-now. he asks me how come i changed? and he says i changed alot-and he asks me why i look the way i do-hes embarrased by me when we go out-honestly my selfesteem is so low -shouldnt he love me for me? or should i go on a diet and fix myself up?