It means you like someone. Because they are like you. You can enjoy all the ways they are different from you because of the way in which they are like you.
It means you enjoy someone. You take joy in their presence. You are happy just to spend time with them. You are happy to see them being happy.
It means you are kind to them because they are one of your kind.
And it means deeper things than these and different things than these at times but these are still good to remember.