How We Met
Sorry to disappoint those rooting for Flynsmer! But Hannah stole Kris away from Brian. But really, it's Brian's fault. Brian was Hannah's preceptor on her path to becoming the stubbornness Paramedic this side of the Mississippi (if you say it with an Alabaman accent it makes sense). So Brian moved away (probably sad that Hannah stole Kris), Hannah and Kris are getting married, and you are all caught up.
The Proposal
https://www.youtube.com/watch?v=z0rbBflhCGs
It's all there folks!