Hi Kair,
The twitching of your eyes whenever she pops up in your mind is in no way an indication that she misses you.
So far, she has done nothing that you know of to show that she is missing you in the same way as you are missing her.
You were so enamored by this girl’s beauty that you most likely created a story in your head about what this girl is like. Your mind created the best possible stories and you fell in love with who you think this girl to be.
This is why despite the fact that you have been able to forget other girls that you have dated in the past quite easily, you can’t forget this girl.