Advice!!

Hi y'all!

So my partner and I have been together for four years now as of this summer. We just bought our own home in March and got a fur baby. Well now he is in full baby mode and I would love to have one. I keep thinking of all the pros and cons but the big thing stopping me is marriage. We are still young (20,21) but have lived together since we were 17,18 due to my abusive home and his family took me in as there own. I know the age is young so please don't be rude. I am just looking for insight from young parents. We both love kids more than anything. We have sleep overs all the time and use to watch our goddaughter every weekend. I'm just confused on what to do!!! Helpppp