This is purely beautiful. It flows so effortlessly and with such sincerity.

"I want to take away his sand
and become a silent beach,"

- The depth in these two lines especially is amazing.

The "sand" here makes me think of unnecessary stresses in his life, or words that upset and don't add meaning. You being that silent beach can show true love, without the irritation of false actions or words. That's my interpretation, but it is neat to think about.

The ending makes me think that you are building him up, he is relying and trusting on you until he has enough strength built up, until he is "full", full of life perhaps, of love....

Lovely write!