Just a question, can u answer

i want everyone to be honest with me. How can someone say they love you one day and then the next they break up with you. And how can someone flirt with you and give you hope and then hurt you in the end. Honestly I dont get it at all. People have feelings to, why treat them like.
They could be going through stuff and you not even know it.
So think before you act.
And also think about what you say to people.