I vacillate
Definitions
To waver between different opinions or actions; to be irresolute.
To sway unsteadily or oscillate back and forth.
Examples
I vacillate between choosing a career in medicine and pursuing my passion for music.
Every time I look at the menu, I vacillate over whether to order the pasta or the salad.
I vacillate whenever I have to make a major life decision, as I am always afraid of making the wrong choice.