Ah it's so realistic that it hurts. I can't say I like the main characters nor the girls in his past relationships but in the end, it's all about moving on. In a different way from the usual. Usually it's about getting over a relationship you once had but Forget me not is about taking your past relationships with you. Accepting yourself for your mistakes and realizing your own feelings about your significant other and taking a step forward with all of it.
But seriously though, I want to know more about what happened to the second girl. I don't remember her name being mentioned so I can really call her the blond sassy girl.