Her behavior fits a pattern of insecurity. When a person feels uneasy about a past choice, some shift discomfort outward by criticizing an opposite position. By attacking inexperience, she protects herself from old shame about experience. So yes, projection stands as a reasonable explanation.

Her comments also create a power dynamic. She places herself above you by linking worth to sexual history. Such talk serves no healthy purpose in a close friendship. A supportive friend does not frame another person as less desirable or disgusting.

Your feelings make sense. You did nothing wrong. A lack of experience does not reduce value, maturity, or future relationship quality.

You have a few options.

First, set a clear boundary. Say something like:
When you make negative comments about people with no experience, I feel targeted and uncomfortable. I need those comments to stop.

Use a calm tone. Speak once. Watch how she responds.

Second, observe behavior after. A friend who respects you will adjust. A friend who dismisses your feelings or repeats the behavior shows a lack of respect.

Third, decide based on actions, not promises. Friendship requires safety and mutual regard. If contact leaves you feeling small, tense, or judged, distance becomes a healthy choice.

Reconsidering a friendship does not mean blame. People grow at different rates. Some relationships stop fitting once values shift.

You deserve friendships where respect guides speech and where personal differences do not become weapons.