It may be that she understands you would be hurt but there was not much she could do about it. Or she did have a choice but at the time was insensitive. But you have a choice about this. And this may be a good time to look at your options. Do you want to have someone else have control over how you feel, or do you want to work on learning how to deal with your own feelings? This may be a good time to start working towards helping yourself.
There are many ways to work on this problem. The best place to start is your self esteem, as I mentioned. It is up to you, though. You are the only one that can work through this and decide what to do.