Baby fever -help, how do you get rid of it


So I’m 21 and my boyfriend of 3 years is 22. Not married but we did buy a house almost a year ago and we are super happy and very financially stable. We don’t worry about money too much, and we just got a little kitten and for some reason the little kitten has also brought baby fever and idk why.(random and weird I know) and we’ve been talking about how we both want to have a family and it’s something we really want. But we want to be married First which is important I think. How do you beat baby fever, no one around me has a baby to get rid of my baby fever