You and Mattheo were really close friends since your first year at Hogwarts. You had started to develop a few feelings, but in 5th year, he began dating Pansy, so you swallowed up your feelings

Today was your birthday. You approached Mattheo in the common room before going to have breakfast, asking him if he had plans today, never expecting his answer

"I'm going on a date to Hogsmeade with Pansy, and then we're gonna have a picnic near the black lake. Why?"