How can a memory feel so special and so hurtfull at the same time?

Its strange how things can change so drastically in one year.... Its weird how some days r insignificant and u cant remember them but others u can picture the moment u opened your eyes... You can remember what the alarm was on your phone.. U know exactly what you wore, what you ate, you entire route... and every detail.... Imagine if every day was a memorable day and u could remember that much detail... its possible no?

The funny thing about today is that it was one of my best days... when i looked into that mirror it was one of the best moments of my life but at the same time it was probably the worst feeling i ever experienced in my whole life.