If you have a talent and you say that you will make something for her, DO IT! She will wait for it and the longer she waits for it makes her girl brain go crazy. She will begin to doubt that you were ever serious and then she will doubt herself and wonder if she is even worth the trouble.
The same can also be said if she makes you something. Even if it’s a glorified stick man, the point is that she took the time to draw you that glorified stick man and you should be happy for it and keep it. She may ask to see it at random and you had better have it easily accessible.