Can I resell my theme if I no longer need it?

I bought a theme two months ago but I find it pretty complex to use. Although the theme is amazing, I no longer need it. I have bought another theme that I’m using which is a bit simple even though not that good looking like the one I previously bought.

My question is, can I resell that theme that I no longer need without the need to sell my website? Keep in mind I have changed the theme of my website.

The theme in question is Boombox viral theme

No, you cannot re-sell the theme