I change my mind
Examples
I'm a Gemini, so I change my mind every day.
When the facts change, I change my mind.
I change my mind a lot. I usually don't agree with what I say very much. I'm an awful liar.
I change my mind so much I need two boyfriends and a girlfriend.
When somebody persuades me I am wrong, I change my mind.
I change my mind so much, I'm better going on my own. Shopping is a selfish activity anyway.