Boundaries become a gift this week. Saying no in one conversation protects yes in all the others that matter.
The single-hearted among you: someone shows interest through consistency, not fireworks. Give the steady one a real chance.
A choice between two options becomes clearer if you write down what each costs you. The expensive-looking one may be cheaper in the end.
Overall: a yes you gave earlier may need revisiting. It is not weakness to renegotiate; it is maturity to notice the cost.