To me, that's always the most important question. If something concerns me, or it interferes in activities I want to do, or with relationships I want to maintain, then that defines it as a problem. Something has to truly bother you in order for you to be properly motivated to really work to change it. If you don't care, then you won't change.
Exercising is a great way to help distract, and resist urges. There is a list of suggestions of things to do instead of SI at the top of the forum. There's some good ideas in there.