一番よく使われている表現はI like youです。
"I like you"は話者が相手に好感を抱いていることを意味します。その反面 "I'm like you"は話者が対象と似ている部分があると考えていることを伝える表現です。
"I like you," the boy said to the girl.
Didn't the president always say "I like you" to his supporters.
I don't know why, but I like you.
I like you just because you are you.
He said that I like you even before I told him anything.
Don't ever change. I like you just the way you are.
Did my friend ever mention that I liked you?
The prince finally told the princess, "I like you."
I don't like you when you are in this mood.
I'm like you, but bigger.
The friendly giant told the kids, "I'm just like you."
Why would you hurt me when I'm just like you?
I'm like you in my preference for colder weather.
They told me in class that women are like men, so I'm like you.
I'm like you in how I always procrastinate when I have work to do.
Don't ever tell me that I'm like you. I am not like you.