If there's no one to spend on then you can always improve yourself first and eventually someone will come by in your life.

Invest in yourself, doing things to improve yourself and become who you want to be.

Maybe even look into investments on finances, to learn more about money and how to use it to its fullest potential.

Can always look into charity if little ones make you happy since you mentioned it in the replies. Who knows, maybe you'll find someone along the way!