You could resent him
It doesn’t happen in all couples, but I’m not going to play nice here—it happens to most young couples: you give up on your dreams a little. Or, a lot. You don’t go to the amazing grad school across the country because your young husband got a steady job in the town you’re in now. You don’t go on the 3-week trip through South America with your friends because, you feel weird leaving your husband for that long. That’s what single people do. You skip out on the experiences that could make you grow. You prioritize a relationship at a time when you should be prioritizing your individual growth. And later, you could resent your husband for it.