Two things Kate, the first being that it's great that you wrote about it. Everything you said is valid. I would be hurt too.Writing things down clears our thinking.

What I now want to say, and I used to tell my daughter this, after 24 or 48 hours have elapsed the hurt will be diminished. You can then choose to walk away from it, or talk to your friend. I would choose the latter.

The hurt will always be there.

Remember too, the photo was probably published when they were all inebriated and thought they should show it to the big wide world.