I have a suggestion, as my 2nd scarf almost two years ago did the same thing. I was making it for my DH and it was almost a disaster.
If you know how to crochet, I finished the scarf as per the pattern, then I crocheted a reverse shrimp stitch all around the outside. It really turned out fabulous. I was totally in amazement and it really went quickly too!
My DH was amazed how I pulled that out of disaster!
It lends a unique look that is both attractive and functional (aka, keeps it from rolling onto itself!)
Let us know what you end up doing!