Yes, she likes attention. Trust me, she isn't any more interested in you now than she was then. She just will do enough to get attention from you and when you try to push it any farther she will make up excuses or disappear.
If she has a boyfriend then that means she can't reject you since she's not available in the first place. If she's not loyal to her boyfriend and is cheating on other guys while friendzoning you or feeding you breadcrumbs then I would distance myself from her if I were you because then that is not cool. That is what I did in my case because it means they are not sincere and you should not even look at her, let alone be eager and tell her good morning. How is she with other guys aside from her boyfriend? Is she very close to someone else behind his back? How would you feel if you found out she cheated on her bf with another guy or you saw her making out or hugging someone else where it was clear she was attracted to him?
To avoid all that nonsense, just avoid eye contact with her if she's not being sincere with you.
Don't be simp; so stop simping for her with "good morning" and other bs messages. There are billions of girls in this world, move on.
Actually, I understand everything you say, but in general I cannot accept one thing and continue.
For example, I want to get someone because her physique seems very nice (For example, I have a girl that we have a mutual friend). I also know that the girl wants someone else. I know they are watching another man right in front of me and talking about him.
But I can't just say "okay then" and continue. I'm starting to think that if I want it, I have to get it. This fuels my desire even more as I am rejected. Then even if I get that person, I don't have a relationship because what I wanted was to get her, not that person or her love. At most it could be something sexual. Other than that, I can't feel anything emotional towards that person.
For example, one day I ran after a girl. I thought I was so in love with the girl. Then the girl agreed and I realized that I actually didn't feel anything. When the impossibility is eliminated, there is nothing left. Just a few sexual desires.
I can't get over this.