I want my former boyfriend's parents to be part of my future life even though we broke up.
He's your ex, though. Why would you do that?
I wanted to get married to him.
It is okay to want to continue good relationships with people even if you have broken up. However, you should be kind and understand if they don't to feel the same way about you.
Fuck that, I'm going to find a way to get him to fall in love with me again. I want him to marry me.
If you and he broke up, you shouldn't be chasing him still. You can't force him to love you or marry you. If you manipulate him into doing it, especially by using his parents, it will be a fake relationship and he will resent you.