I’ve never met a yarn-crafter who doesn’t have a slightly obsessive relationship with buying yarn. Most of us practice abstinence (i.e. yarn shop avoidance) as the only cure to this problem, to varying degrees of success.
This was something I was discussing recently with a friend who isn’t a yarn-crafter at all and she put it in a way that I thought was kind of lovely. She said that buying lovely yarn was like buying little balls of hope. That hope is that we will achieve happiness through owning/working with the yarn.
I think that’s true. Most yarn-obsessives I know take pleasure in both the actual yarn (colour/texure) and in the ideas for what to make from it. As long as you don’t fall into true hoarder territory where the yarn starts to take over your life, I think that’s probably fine!