Why do some ghosters gaslight you when you ask them what’s wrong?

I had a best friend of over 10 years who suddenly started to fade out of my life. When I noticed her being too “busy” to see me, I asked her if I did anything to hurt her and she said everything was fine she just has a lot going on. She ghosted me permanently after that. We haven’t spoken in 5 years.
I’ve seen this type of thing happen in friendships and romantic relationships. Someone will ghost you or fade out of your life intentionally, then when you ask why, they will deny ghosting you and tell you you’re overthinking. When in fact that’s actually what they’re doing.
Why do some ghosters do this— ghost and gaslight when you ask them about it, or tell you you’re overthinking?

Why do some ghosters gaslight you when you ask them what’s wrong?
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