The movie is more about how our love memories stay in our heart even though we moved on. What if you come across your ex-girlfriend in real life and how you behave with them.
There is a truth about memories. The one you close, the one you hate, the one you suppressed, all stand in the same distance in your memory. We never forget people but block them and they pop-out any time when we remember their related events.
Here the hero unconsciously moved towards her but in mind he wanted to avoid coz that may destroy his present family life. The truth is there is no meaning or no reason available to the unconscious mind. it just displays through your behaviour or it jumps out of your loose talks. The whole movie if you follow the hero move towards his ex-lover knowingly he will get into trouble.
It is a tussle between the emotional experience of your true love Versus the conditioned experience of your married life. There is no emotional love in married life but a conditioned one. This conditioned love has a maturity in the longer-run of becoming a true emotional love especially through childrens.
You cannot erase your experiences whether it is good or bad. Maximum you can block, that is the theme of this story. Instead of showing some experiences, the writer tries to explain by taking the concept of emotional love and conditioned love.
Hence,
Here there is no new message that you should get away from your ex in-order- to have a smooth life.
It is about how your memory works.