That's a tough one--partly because it depends a LOT on your girlfriend's specific personality. A few possibilities (if you try 'em, go easy, see if they seem to be getting the response you want--and back off fast if they don't):
1. Honey, guys will be guys, so maybe they did j**k off. Guys do realy do that, but,
2. Babe, do you realize how few females have both the body and the ESSENCE shining through to get over 100,000 views, even in the nude? You are SOMETHING! And I mean that in a GOOD way.
3. Some of the finest art in the world never got any respect during the life of the artist. Check out Van Gogh--and, sweetheart, you've still got both ears! (Or a message to that effect; be careful here.)
4. Love, if you don't want to do pics any more, I understand that. You KNOW I'll ALWAYS have your back, whatever you decide. People really can be jerks.
5. Hon, there really are a lot of sex perverts out there. The super-bad kind, you know? If you ever do want to do any more pics (and I'm NOT saying you should), then we need to figure out a way the pervs can't reach you with their twisted comments.
6. Girl, your friend's comment reminds me of Edward Land, the guy who invented the Polaroid camera. He always said he avoided negative people, 'cause 1 negative comment could kill a good idea. Not saying your homie is negative, but maybe she's--a little envious, maybe? Whaddya think? Am I off base here, or....?
Most importantly, she wants to be HEARD but may NOT want to have you solve her PROBLEM.
Hope this helps.