Second, I don't know if you changed your character because of an affair, or if you were originally withdrawn and derailed. I think every student has done it. I am an excellent student in the eyes of the teacher, but I was informed of cheating by the whole school. You have no idea how excited I am. Now think about it. I want to tell you that you should open your heart to the outside world, and you will feel completely different. If you really can't change yourself.
Third, it is still your personality. You should be confident. In fact, many people are treasures, and you don't have to feel less than others!
I can't give you job advice or anything, but your biggest problem is your personality. When this problem is solved, many problems will be solved. I hope you can think about it, come on!
Your principle is very strong, but you have to understand that it is too easy to fold. Don't ruin yourself for this. That's pathetic. After all, life is so vast, how can we accommodate such negligible things? Jump out and look at this problem, maybe you can see the scenery without looking.