Yes, wrong decisions are necessary for every field of life. Humans make mistakes and there is nothing to do about it. That is how one learns the perfect way of doing anything, only through mistakes. The same is applicable to love life. You need to fall in love with the wrong people.
At least for once, you need to go in a bad relationship, one which is full of lies, one where trust is missing. You need to be in a relationship where you do not get your expectations fulfilled. You need to choose someone you see a working relationship with in future, but they do not think about you that way. You need to give a lot of good behavior to people and end up with nothing. You need to feel broken at times when you lack the energy even to move out of bed in the morning.
You need to feel that heaviness which makes you cry out of nothing. You need to give people opportunity so that they waste them. You need to trust people and have that trust mistreated and broken. You need to be used by people for their own good. You need to go through a few heartbreaks maybe some of them should be serious. Do you know why? Because only when you go through the worst, you understand the worth of best.
We all know the value of sunlight because of the nights that we spend alone. We all understand and appreciate summer because we have snowy winters. Only after people break your trust, you would be able to enjoy having people who make it up to you. Only after the toxic relationships once the real once comes to you; you will realize why the last ones did not work out. Your depressed days would make you realize how the happiness feels, what the worth of that smile is.
You will take care of the people who never fail to bring a smile, who give you the life you deserve to receive. You would then appreciate the people who never waste chances given by you who never make you feel you really exist. Only the negative aspects can brighten your vision so that you really appreciate the positive aspects, you learn to count the blessings and not the sufferings. Only heartbreak would make you feel happy about the love that tries to make you smile.