Josie
Darling, of course it's his parents idea. That being said, the truth is that Zach could have decided that he was not going to marry you so get that thought out of your head. He did choose you.
There is nothing to say that you both can't have a long engagement. I can't imagine anyone wants you married while you are in school. Zach will make a very good husband.
The question you have to answer is would you want him to marry anyone else?