likes和liking都不对.正确的说法是：
He is like you.
当like作“像”解时是介词,它是不能作谓语的,前面必须要加系动词（如be,looks）才能构成一句话.介词没有人称和数的变化.如：
He is like you.
I'm like you.
You are like me.
当like作“喜欢”解时是动词,可以直接作谓语,有人称和数的变化.如：
He likes you.
You like him.
但是不管哪个like,都不能与ing连用.介词like肯定是不能加ing的了,动词like也不能加ing.
句子前有look,后面的动词（仅指行为动词,而且like,want等表示一般情况的词除外）确实要用ing形式,表示该动作正在发生.如：
Look!He is drawing a picture.