My, so many SP questions this week 
/me blames 9gag 
Now, I don’t know about not wanting it too much, but Sirhubi has the right idea .
If you’re focusing on your body and/or you’re trying it when you first go to sleep it’s very unlikely you’ll hit SP. Thinking to yourself “OH MY ARM IS TINGLING!” is only going to make you focus on your body, where as the biggest thing that can help is ignoring your body.
But the biggest thing I think you should know is that SP is not a necessary step to WILD or lucid dreaming in general. It can help sometimes, but you don’t need it at all. Out of about 140 LD’s, I can count the number of SP induced LD’s on one hand.
Here, I really suggest you read my article on WILD: linky
The thing you need to realize is that all the guides for WILD everywhere are just a basic template, they don’t work for everyone. Well, just check out that article and you’ll see my feelings on them