I sent a text message to invite my favorite girl to come out to play on Sunday, and she replied, maybe I have something to do and invite me to dinner when I am free.

You should still have unrequited love now. You must be shy or other psychological factors, so don't get in touch with her. So, you can imagine the result of asking her out so abruptly under unfamiliar circumstances.

I suggest you: if you really think she is good and worthy of your love, then confess! However, before you confess, you should contact her more and let her find your goodness, but you should not pretend, because it will have the opposite effect. Go ahead, show the original you, the sunny and natural you, lay the foundation for your confession, and you won't be rejected then. However, even if you refuse, it doesn't matter, because: there is no fragrant grass in the world, so why unrequited love for a flower!

I hope it helps you! ~~