Ugh I hate when that happens! It happened to me not a while back, when I went to a family friends party and I wore my hair curly. Like you, I was having a great hair day so I was super excited and got compliments until one person said, you would look reallyyy pretty if you straightened your hair! I got offended because that hurt more than she probably meant it to, so I just said "thanks but no thanks-I like my curly hair!"