1. I'm debating between... [option A and option B] 2. I can't make up my mind. 3. I'm on the fence. (= I'm in the middle, I don't know what to decide) 4. I'll take that into consideration. 5. On the other hand... 6. I'm having second thoughts. (= I'm reconsidering my decision) 7. I changed my mind. 8. He convinced/persuaded me to... 9. Looking back, I know it was the right decision. 10. It's up to you. (= You can decide)