She’s taking her delusional feelings way too far. 

It’s incredibly common to have a crush that goes unrequited. I’m sure merely reading that sentence made some crush of yesteryear pop into your head.

The most difficult kinds of unrequited crushes aren’t crushes on aloof people who couldn’t care less about you. The most difficult crushes are on people who have a lot of affection for you, and people who are always around you. When your crush is always friendly towards you and never gives the impression that they dislike you even a little bit, your mind can wander into two different delusional places. You can either think, «Wow, they must be secretly in love with me, but not know it yet,» or «What is so wrong with me that this wonderful person wouldn’t be into me?» Neither of these thought patterns is a solution to the crush. Falling into delusional thinking will only make the problem worse. 

One of the most critical parts of getting over a crush is admitting to yourself that the other person is not and will never be into you. If you can’t get past that reality, it’s going to be a long, hard road ahead. Again, accepting that fact is much harder when the person you have feelings for gives off flirtatious vibes or is generally friendly towards you. It makes you feel a little bit of hope that the object of your desire might learn to love you eventually, which only prolongs the crush and, therefore, the misery.