I'm thinking of deciding that my so and I should start using birth control after being together for over a year and not using it in the past
Is this to enjoy safer sex?
Yes, I want to have a certain amount of freedom
I think that's a wise decision. If you're remaining monogamous, responsible sex is still very important.
I don't want to sudden get news I'm gonna be a father, you know?
That's understandable. If you feel you're not ready for fatherhood, then practicing safe sex is extremely important.