Did you say something you shouldn't have said on a certain occasion or in a certain context? This is something you need to sort out. There are so many ways she meant it when she blackballed you and said she was annoyed with you:

You never caught her point, and during the course of the relationship, maybe she just wanted an ice cream, and you bought a callow chicken instead.

You're clingy to her. This may be the case that you give her a sense of oppression, so that she is not very comfortable, and then listen to the words of some friends, or see some articles, their own feeling that you are not the kind of love she expects.

You're nagging. If you are nagging, then you must change, men are nagging, it's really killing me.

You have problems in your relationship, such as long distance, quarrel, angry or let her down (some anniversary, special date, etc.).

Because you don't have a lot of information, it's just one sentence, and it's harder to grasp the real situation, so you can refine it and ask again if it's convenient.

Whether you want to break up or not, I think you already know the answer.