Should I give up this girl?

You can keep your opinion, sometimes your pursuit may bring trouble to her, or you can think of a good place, she is testing you!

But since you said she refused many times. . . But I sent you a message earlier. . .

I feel a little contradictory. .

If it's as you say, she shouldn't hate you, but she's not ready to accept the further development of your relationship, so you might as well save some strength, try to distance yourself from her, see her reaction, see if she has feelings for you, and then consider whether to pursue it!

Because you must give her time to think about whether she has feelings for you!