My girlfriend said I didn't take her seriously, so depressed. ...

Dude, do you know what playing hard to get is?

Blx is sick and must be treated!

You talk it over with her. Both of them were brought up by her parents. Why should she take your kindness to her for granted? After the chat, give her a temporary cold shoulder. If she really cares about you, she will reflect and save it. If not, that person, we don't have to be mean! Girlfriend is not for ancestors! Our posture really doesn't have to be low into the dust!