Fact: J.K. Rowling secretly revealed to Alan Rickman that Snape had loved Lily his entire life in order for Rickman to capture the character. Rickman was the only person to know of this until the release of the final book in the Harry Potter series, the Deathly Hallows.
“I don’t dwell in the past; I don’t wallow in old events and emotions. I don’t waste time on regret. No use going over and over the details of what already happened.”
As time goes on, you’ll understand. What lasts, lasts; what doesn’t, doesn’t. Time solves most things. And what time can’t solve, you have to solve yourself.