Do not answer calls or messages
Your partner often does not value your words. Or you phone / message them but they do not answer it. They don't mind that you messaged. They often talk of being busy. So you need to be alert now.
Your love is no longer worth it
At the beginning of the relationship, walking around holding hands, sharing the same ice cream, eating on a plate… he loved all this public display of effect. But now everything seems childish to him. In the message, now you have more formal words than love you, miss you, then understand that someone else has taken your place in his heart.
You do not mention even in front of their friends
Do you have an unknown face among their friends? If your girlfriend is a little bit concerned about you, then parents can not be reached, at least at least friends!
https://www.youtube.com/watch?v=6GlndTgi_Js&t=506s
Change plan
You both made a dinner plan or promised to meet in the coffee shop and you left on time. But suddenly he refused to come at the last moment. It can happen once or twice but more than that and give excuses such that if you have to get up early in the morning, or go to work, then know that now he is more interested in you than you.
Excuse to be busy
If your girlfriend makes an excuse to get busy with meeting or calling you, then be cautious because this excuse indicates that your girlfriend wants to stay away from you. Earlier she used to take time for you from her busy schedule, so what happened suddenly.