Juan and Michelle met through Juan's sister, Rocio. Rocio and Michelle were good friends and since the two siblings were roommates, that's where she eventually met and spent time with Juan.
They quickly became friends and spent a lot of time together. After her high school graduation, Michelle moved out of her parents and became roommates with Juan.
Over the years Juan had developed feelings for her, but Michelle had no interest. After being roommates for three years, she had also begun to develop feelings for him. She eventually told him how she felt and the rest is history!