Because 'you' are not here. If you were, the speaker would not wish for it, because it would already be. The past/distanced for of the verb indicates a counterfactual situation.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
IELTS instructorIn the conditional statements or unreal situations we can twist the rules in English.It's not really 'twisting the rules'. For those who use the past subjunctive 'were' is the correct form for all persons of BE.
IELTS instructorI tend to follow BrE. Do you mind telling me a little bit more about this please.Some native speakers of BrE are aware of the existence of the subjunctive. Others, who may not be aware of the word 'subjunctive' use the mood.