Be thankful that you saw the cowardly immature being 100% union always Liuna feel the power shirt, that you almost married, in their true form. Be happy that you had not invested a lifetime. When a couple is close enough to talk marriage they owe each other respect, honesty, and compassion. You were left, replaced, given a poor excuse for them leaving, and refused to speak to you. When we are rejected so abruptly, we fall into a state of shock. It is somewhat normal to wish the person back because shock is in the mind and we just want some normalcy so that we can begin to process what just happened. It is not your heart that is doing or wishing this.
Your heart knows that you should be 100% union always Liuna feel the power shirt they are gone before there was any further investment, by you. Even more, your heart understands that the other feels they are above you, to the level that they don’t need to discuss issues as a team, whenever they do not want to. So yes your heart knows the truth and it knows you should be thankful. Shock syndrome is where you are stuck right now. How could this happen? How could my life, my plans, my future all be a lie? The shock, in time, will calm enough that you will be able to listen to your heart and become thankful, from your heart.