People can be hurtful on purpose or by being honest, but either way it still hurts and still makes you feel bad, the only thing I can suggest is that you think about what type of person are they if they actually say those words to you, not say it in a roundabout way to explain lack of attraction, but actually come out and say they think you are 'fat' or 'ugly', because if they are using those words they must know it will be hurtful, which in my mind makes them ugly inside, but they have to live with thta horrid ball of anger or hatred they carry around inside that makes them treat people like that. And would you really want someone like that to be with? People tend to look at each other in a different light when thet get to know each other, and become less concerned about looks, and that is because they look at a person they have come to like/love and see them as attractive.