I feel very sorry for you:

With you, this man not only doesn't know how to love you, but also puts the responsibility on you and abandons you so mercilessly.

What I want to say is that you already know that you regret it, and you shouldn't give everything for such a man.

In that case, now your heart is broken for such a man who is not worthy of your nostalgia. Are you worth it?

Everyone makes mistakes, and it's not too late to wake up in time.

You must never punish yourself with the mistakes made by others, that's what fools do!

You are so young, and there is still a long way ahead. I believe you will meet someone who is sincere to you.

Live well, for yourself and for your family. Let the people who have hurt you see that you will not be decadent for them!