What happens if I don't withdraw my other college applications when I was accepted as Early Decision

Was accepted as Early Decision and have committed to attend that school by filling out the advance payments and housing forms. I’m on my way to this school.

However, I do have some other regular application that I have not withdraw yet. I am curious to find out whether I was accepted or not. But this could ruin the chance of other applicants or even admissions because I know that I would not attend and this is playing the card with them.

I mean, I did spent so many hours and money on these applications. Should I withdraw them now?