The manga was something like this teenager lives by himself and can bring plants to life and this taller guy comes out of nowhere in his garden and tries to kill him b/c the major bad guy looks just like him. he used a plant gun thing and they eventually get to his world which is basically a desert. there was also a snake made of crystal that contained water. the main bad guy and the main person look alike and have opposite powers. it does have shonen-ai and i just cant remember what series name it was. im unsure of its status right now. i think it was taken by tokyopop or something...

Silver Diamond

thank you!!! 😀