Me and Marissa just got into a serious argument for literally 3 hours. Poor thing is so tired and…

Me and Marissa just got into a serious argument for literally 3 hours. Poor thing is so tired and fighting her sleep. All she wants to do is sleep on me. I feel so bad hearing her screaming but she needs to learn that she can't always be on me 24/7. She will literally wake up out of her sleep and cry so I can go pick her up. And it still continues. Any one can give me some advice on this? Im starting to get impatient and I don't want to stress myself over something so small.