I have been in a similar situation- and would refuse to accept compliments or feel that I had to return them or cancel them out with a negative comment about myself. Now I have learnt to accept them, even further delete rude and pointless personal critiscms.
A compliment is a gift, not to be thrown away carelessly, unless you want to hurt the giver. Eleanor Hamilton
On the beauty scale I find that a person who is truly confident in themselves, and have a positive attitude far surpass a person with a cute face and good body wearing a scowl and complaining.
Other wise just enjoy yourself, outside looks are just one small part of bieng a beautiful person.