Stop giving a fvck. Once you think you have given up all the fvcks you could possibly give, then give even less fvcks.
If you're outcome dependent and don't care what happens, you won't lose your frame. Just like if you were approached by an obese lady at McDonald's, you wouldn't care about losing her because you invest NOTHING into her. Since you INVEST NOTHING, there is NOTHING TO BE LOST.
You can only 'lose frame' when you invest your identity in an unstable source such as a woman. Since that woman is subject to change, your identity will be shaken because you have invested part of it in her, and now she if she leaves, you feel like part of your self-worth has left with her. When the truth is you only lost what you invested in HER, and it was YOUR choice to invest in her at all to begin with.
If you see her value as a rare diamond to be cherished and possessed, you will be upset when you lose it because you thought you had something great. But if you see her value as a clump of dirt, well who cares about losing a clump of diet?
So the problem is your initial assessment of her, and ultimately rating her higher than she is. When really you're the precious diamond and she's the clump of dirt. Or at least you have to think this way. Then you will have the confidence to stay in frame all the time because you know you are above her, and that if she leaves nothing of you will be lost.