Issues starting our family.... HELP!!!!

We've been together for almost a year now. He say after a year he was to get our own place and get married. I love that idea, but the problem is o was to start our family now with a baby. He wants to wait a few years. I thought I was pregnant recently and he started acting like a major asshole, no earlier today he did apologize for that but it still scared me. I wanna to start my family young! I'm 21 and he's 25, that's what family is to me and he's wonderful with my nieces and nephews. You would honestly think that they're his! I'm just super confused right now... 😟☹😦😔😓😖😢