My toddler held me whilst I cried

I try my best not to get upset infront of my baby because I don’t want him to see me like that, today has been so hard and mentally exhausting, I’m sick, I’m a single parent and I’m just so drained, he’s not been feeling great and neither have I, we were up all hours of last night and all of today has been non stop, I put him down in his bed asleep for the night, come through to the front room and sobbed my heart out, only to my surprise to find him plodding through saying mama not cry and waddling over with his arms out to cuddle in, playing with my hair, just like I do him when he’s upset, I just lost it and cried and cried I couldn’t stop and I tried so hard because I felt so shitty, he was wiping the tears from my eyes and saying ewwww wet and giggling which seemed to slow the waterworks but I’m so proud I’m raising such a compassionate caring little boy