Why doesn't my girlfriend let me call her and send her a text message ~

... how can there be such a person ... if this situation has only recently appeared, then you should be careful. It is likely that a girl has such behavior because she doesn't like you.

If this is the case from the first day of your relationship, I hope this is her habit and personality, so if you love her, follow her.

The main thing is to take a closer look at whether she has changed from before.

It's hard for her to say that at first. It is very likely that she is such a person, such an enterprising personality. But this seems a bit excessive. I suggest you have a good talk with her, make it clear to each other, tell her what you think and ask her what to do.