To really know what i want

I am in a place with a lot of confusion with my BF.
Somedays I am sure I want to be with him. Others I really dont know.
What confusing me more is that when i say ok i want to be with him?
Still I stay confused with always the same questions that comin up ” is that really what you want” and it adds evidence to the fact that maybe i don’t want him. And i feel devastating.
I am stuck in this place since too many months.
Please Help