My ex-girlfriend sent me a message. What should I do?

First of all, I think you are a little too hard on your ex-girlfriend. There is no language, nothing to say, these are your own feelings, your own reasons, because you feel boring, so you didn't even officially end it, so you ended everything yourself, and you didn't consider her from beginning to end. I think you are selfish in this matter.

During this period, she didn't quarrel with you, but wrote some of her own feelings, which I think is very rare, no matter what the reason.

She must know what you mean, so she will say, you do your thing and don't have to answer me. She is not a wayward girl. But she thinks your relationship is boring and doesn't intend to give up, so she will say that she misses you. But because you quit quietly, she can only accept the result.

If I were you, I would reply to her, whether by text or phone, apologize for my sudden disappearance, tell her the reason why I decided to break up and get her understanding.

The way you end it will make her stay in that memory for a long time. If you don't want her to do this for herself, you'd better make it clear.