Proposal deadline?

Marie
So me and my SO have been dating for almost 2 1/2 years we live together and have been living together for almost 2 years now. we were highschool sweethearts and Im only 19 and We have talked about marriage plenty of times but he always says he wants to wait for the "perfect" time. I personally do not believe there will ever be a "perfect" time. So i told him that he has 2 years to propose to me before I end the relationship. I dont know if I was wrong for putting pressure on him like that but he just laughed like he thinks im kidding. Im not kidding but i dont want to make him feel pressured but at the same time I know that if I didnt I would be just his girlfriend forever and I dont want that im pretty oldschool and beleieve there is some sort of special connection between those couples that are married. Am i being too pushy what do you gals think?