Marriage??

So my boyfriend and I have recently been talking about getting married. We've been together 3 years, live together, and tbh are basically married (because of the way we act). It seems to me that he wants to get married fairly soon, I mean, he is 28, but I'm still 21 and I don't really want to get married until I'm done with school. Basically I want to have enough money to have a nice wedding and possibly fly out family if they can't afford it. Is this weird or wrong of me? Did any of you guys talk about marriage with your SO waaayy before actually getting married? He's not pressuring me or anything, I just feel a little weird about it. Thanks in advance!