Close to you can be used non-physically also. Ex: My level of English is close to yours. (referring to degree) My sister and I are very close. (in this context "close" means we talk often and are good friends) The store is close to opening. (here "close" means the store will open soon) The store will now be closing. (the store will shut down for the night)

"Close to you" is used in physical way only? "Close to you" can be used for description of physical distance. You are living in the house next to my house. I am close to you. "Close to you" or used less commonly "close with you" can also describe emotional closeness. You and I have been friends through difficult times. I feel very close to you. Here is an old American love song, "Close to You": https://www.youtube.com/watch?v=6inwzOooXRU May I say "close to your degree" for example? This is not a phrase that I can understand in American English. It may have usage in other English-speaking parts of the world, but I am unsure. I hope that helps. - Jerry