Too early with Bf

So me and my boyfriend have been together for only 5 months almost 6.

I know it is waaaaaaaay too early to be thinking about marriage and stuff.

We definitely don’t talk about it yet as we are still dating and getting to know each other. We haven’t even done the deed yet but have gotten close to it.

I would be lying if I said that I didn’t think about marrying him one day and what a good dad he would be.

I mean we both don’t talk about this because we both know it is too early but when is a good time to bring this up? Maybe like a year and half after dating?

I obviously don’t want to scare him. But I am someone who only invests in someone if I think they would be a great life partner and parent. If I don’t think they would be then I do not waste my time.