Living together before marriage

So my boyfriend and I want to live together. We have been together for a year and three months. My parents hate the idea but I still want to do it. Because it’s shacking. I’ve been wanting to do it since August. Since I told my parents now I am scared to do it. I feel like I might regret it in the long run. We are planning to move at the beginning of 2020. But I do kinda still want to. We have been talking about how to budget and we are going to split the bills.

^Note I didn’t have this feeling before my parents situation *