Do you mind getting married or to love someone who lost their leg after a car accident?
The fact that someone is missing a body part has nothing to do with the person they are. Any one who is willing to love your friend will love her for who she is, not an abnormality that she has no control over. If anything, she should feel comforted by the fact that when (not if) she meets a wonderful man, he will love her for who she, for her personality, for her love returned. She has nothing to worry about. It may startle some people, but if they are not willing to accept her for who she is, then it is their own ignorance for losing a potentially wonderful woman.