Here some reasons giving why girl starts ignoring her Love..
1. You said, You are Busy....
2. You got bored by her talks....
3. You ask her to wait, but u forgot she iswaiting. .....
4. You compare her with someone else.... .
5. You forgot replying her text....
6. You replies act like killing conversation.....
7. You Lied to her..........
8. You give importance to something else more than her...
By ignoring her love for you, it is a "slap in her own face." Unless she that is willing to give out her owe love for you and to bend over backwards for you. In my own opinion she should be loved in return and then other people will see that will maybe love in return of your love for you.