I often times didn’t make decisions when my ex was involved… I let her make a lot of decisions. In fact, she accused me of being indecisive. But it wasn’t true, and it need not ever be necessarily true of someone.
The reason I didn’t make many decisions was because I chose to refrain from making a decision that didn’t matter to me. Being unwilling to make an arbitrary decision isn’t the same as being indecisive. Choosing not to decided is a decision. Not deciding something (i.e. being “undecisive”) is not at all the same as not being able or being afraid to make a decision (i.e. indecisive).