Here are the cards chosen.
Card 13 shows that you're being led by inner guidance that the time is right to take action to move this relationship forward. In Card 17 the Prince (your boyfriend) is at your feet. This is a nice progression from the first card, showing that indeed things seem to be headed toward a proposal. This card shows a very strong and deep relationship. However, the final card, Card 19, shows that Cinderella and her Prince can't get their schedules together. This card usually shows up when something is planned but for some reason plans change.
Based on the cards, it seems that your boyfriend may have plans to propose this year but something seems to get in the way throwing things off course. It may be helpful to act as his fairy godmother and put a few ideas in his head to steer him in the right direction.
Purchase The Cinderella Deck