Recall

I can still recall me sitting on the passenger seat;
Looking at you from time to time;
And you will smile;
Very sweet;
I believed we have had great time together;
It could be my self-fulfilling imagination;
But why it lasted for 9 months?
If you're not happy?

I can still recall me sending text messages to you;
Day and night without fail;
And you will reply;
Very soon;
I believed we have had great time together;
It could be my self-fulfilling imagination;
But why it lasted for 9 months?
If you're not happy?

I can still recall you telling me that wanted a vacation with me;
To the sky and to the sky;
And I will say;
Very far away;
I believed we have had great time together;
It could be my self-fulfilling imagination;
But why it lasted for 9 months?
If you're not happy?

I can still recall me telling you to appreciate her;
I can still recall you sending me text messages to tell me how suffering you're;
I can still recall you walked away from me, without looking back;
I can still recall the nights when my pillow was wet because of my tears.

How could a person changed in such a short period?
I don't understand.