Wonder if i'm really cute?

My male officemate always tells me every morning that I look cute of what I wear, what my hair looks, etc. Even if I wear jeans and shirts, dress pants and blouse, and don't wear make up except lip gloss, he tells me that I'm cute and y and I just say "thank you and so do you" Is he flirting with me? He always comes to my office pretending to ask what am I doing. We actually work in the same department. He is cute also but I know he is married and so am I. His wife doesn't work with us and she's little chubby. I have long black hair, tan skin by nature, size petite 4. Does he mean it when he says I am cute or y? What should I do? Should I make steps to stop him or it's okay for him to continue saying those things? Please help me because I am Asian and I'm not sure what I'm supposed to do. I don't want to tell all these to my husband bec. I'm afraid he will let me quit with my job. I like my job but I'm sure what to do now. Please help.