If you mean that you are requesting someone else do something: "I want you to go to the store and get a dozen eggs" is correct. It is generally used as an an instruction. "I wish you would go for a walk and get some fresh air" is also correct, but is used as a (strong) suggestion. If you mean that you desire another person's presence: "I wish you were here," is what most people would say. "I wish for you" is not really used. "I want you here with me" is also used. (Be careful with saying simply "I want you." Used without qualifiers, it implies a strong and immediate sexual desire.) "I wish for you" is only used in the context of one person making wishes on behalf of another: "I wish for you to be happy and healthy." It is somewhat formal - I would be more likely to say: "I hope that you will be happy and healthy."