Okay, so... there's a few different ways to take that.
First being you've got yourself a crush but you realize that ultimately it's not a good match for either of you so you're just hoping that if you avoid her, the crush will go away. I get it. I've done that myself in the past.
Or, like the first one, you've got yourself a crush but you don't think you're worthy of being loved, so you're not willing to indulge in it and are hoping that if you avoid her, the crush will go away.
Or you're hung up on someone else. And this crush you've got on Diana is making you feel uncomfortable because it makes you feel disloyal to this other person. So you're avoiding her in the hopes that the crush will go away.