If buying some needles and skeins of thread every two weeks makes you happy, I say hooray!
I've actually come back to embroidery this year after a five-year break...my new glasses now allow me to do close-up work again. I started doing tea towels back when I was a girl in the disco era.
I picked it up again this summer to make shower gifts for a niece, and found that when I stab fabric over and over to make something nice for someone I care about that it physically made me feel better.
So let us not call it an addiction; let us instead call it therapy!