Kay,
If you let one person get to you, that person has control over you. That isn't a good thing. I know you are hurt. You should be hurt. Hurt for a while. Not so long that you are overwhelmed by it, just enough to feel it, and move past it. You are SO beyond this, and it is probably the combination of a lot of little things that are getting to you. As someone said above, you might just need to let this one roll off your back. You can't change it. Just accept it for what it is/was-some insecure person's comments about a situation he/she doesn't know anything about, concerning a person he/she doesn't know even know! When you break it down like that, it really isn't significant. Hang in there. This, too, shall pass.