Breastfeeding...

I feel like the only thing I have been doing these past 3 weeks are breast feeding. My daughter cluster feeds all night and a lot during the day. I'm so tired and my nipples freaking hurt! I've cried a few times and sometimes feel like giving up. She latches perfectly but I'm just so tired. But when I look down at her and watch her nurse, my heart is completely whole. I can't beleive my body is keeping her alive. It's so amazing. I never thought I would love breast feeding as much as I do.