waver between (someone and someone else)
to vacillate between choosing one person or another. I had to appoint the new manager, and I was wavering between Jane and Janet. We wavered between Bill and Bob for the position.
waver between (something and something else)
to vacillate between choosing one thing and another; to linger indecisively between doing one thing or another. The captain was wavering between St. Thomas and St. Croix. We wavered between chocolate and vanilla.