It seems to me that believing in Santa in order to make you happy would be like falling in love with the idea of love, rather than with a beloved.
Lots of people, of course, fall in love with the idea of love. They really don't love who they suppose they love. They just want to be in love so much that they convince themselves that they are.
I suppose that believing in Santa in order to make you happy is something like that. You don't really believe in him -- not on all levels of your psyche -- but you want to believe in him so much that you convince yourself you do.
Lots of people, of course, fall in love with the idea of love. They really don't love who they suppose they love. They just want to be in love so much that they convince themselves that they are.
I suppose that believing in Santa in order to make you happy is something like that. You don't really believe in him -- not on all levels of your psyche -- but you want to believe in him so much that you convince yourself you do.