Tough skin is not the answer. A hard life doesn't equate a hard heart. So on bad days put your memory on repeat and replay; brownies baking, wash on a line, a new dress made just in time, sleepless nights waiting up for you, bended knee lifting up a holy prayer, late night snacks for a broken heart, holding hands for a nature walk.
So what if she cannot remember your name. Don't be fickle over such a little thing. She recognizes your eyes and that bright childlike smile. So twinkle a bit and light up her day. She's the reason you can tie your shoes this fine day. Such a simple thing that now for her you can do.
Don't tell me her life is without cause for even now she's teaching you about love. So when your tears start building and your heart bends till you think it will break put your memory on repeat and hit play.