Long story

Ok, so me and my boyfriend of 7 years have an amazing relationship, moved into our own house, he works full time, we are both 22, I'm just out of education looking for a full time job ATM. We have discussed kids , I really want a baby now, like every second of every day I'm going round the walls thinking about it, he says wait a few years, but how I'm feeling at the minute I don't think I can, it's getting to the point I'm getting upset seeing people with kids. I don't know what to do, iv minded loads of kids and I know what it entails, I don't think I could wait a few years. I would never trick my partner but it's got to the stage where I'm questioning our relationship cause he doesn't want what I want yet. I know that's really selfish. Help !!