I have one like this, she's my on again off again, redheaded model. She drifts off and comes back, this has been going on for 4 years now. We're back on again, but I'm sensing she about to drift off again.. which is fine. I honestly do not care.
Why does this happen... it's because she is hot. She has a lot of options, and she has countless numbers of men throwing themselves at her. She never really has to put in any effort at all because she doesn't have to. She doesn't make an effort because, frankly, she doesn't know how. Now I COULD keep her around for much longer than the typical 3 months when we are on, but then I would have to morph into something I'm not... and that is why she can never really build anything with any of these other dudes she might see for months longer, because to be with this flaky @ss chick, you have to put up with a lot of bvllsh1t, and twist yourself into a knot to the point where you are no longer the person she was attracted. She loses interest and she's off.
She said something to me a couple of weeks ago when I was at her place, "I don't know why I keep coming back to you, when you are not around I can never really get you off my mind." The answer was simple, "You are comfortable with me, you know that when it comes time to move on I'm not going to become a pathetic sniveling fool, I accept you for who and what you are and I do not judge you, get butt hurt, or try to change you. I am the old pair of slippers that you can't toss out because they fit."
She laughed, agreed I was right and showed me a e-mail that her most recent ex sent her. I got about halfway through it and could not continue reading the cringe worthy rant. The part I read was him blaming her for her mental and emotional condition, and that was the reason for the split... how he missed her... wanted to get back... practically begging her to change her mind.
First off, he was right, she does not put any effort into a relationship (again she can't) and that she is a flaky @ss chick, emotionally distant, and hard to be in a relationship with, where if you want to be with her, YOU are going to have to put in ALL the effort. When we are dating... the 'break' usually comes when I've made plans and she cancels... I do what I ALWAYS do just go on without her and tell her to contact me when she's available.... what usually happens is she'll ring up one of a dozen dudes that are texting her, or one of her thousands of fans on Instagram, and they are so happy to have a shot that they drop whatever the fvck they are doing and start doing back flips. This makes her feel good for a while, but then she gets bored with that... then she reaches out.
I am totally okay with this, I accept her for what she is, I do not try to change her. When my turn on the ride is over I get off. This is how you should always be with women. You can't change a woman, she is who she is and if she is going to change it's something SHE has to do, and for GOD's sake, don't send her some embarrassing wall of emotional BS, because you never know who she is going to share that with.