If it makes you feel better, make arrangements to go visit one time right after her surgery just so that you can see for yourself that she is doing okay after the surgery. The separation will likely be harder on you than it is on her, as she will get lots of loving.
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“You’re so hard on yourself. Take a moment. Sit back. Marvel at your life: at the grief that softened you, at the heartache that widened you, at the suffering that strengthened you. Despite everything, you still grow. Be proud of this.”