I don't always think age should always make a difference, I've seen people older than you get married and were not really mature enough for that step. But I have to agree with others that have said to sit down and talk to your parents. Because sometimes people outside the relationship see things that we don't see or miss. Love does blind a person. So take what they have to say and pray over it. Let God have the final say in the end whether or not you get married right now.