Mojave is correct, except 여기에서 is usually followed by an action verb. So, I would say "네가 여기에 있으면 좋겠어(요)."

-(으)면 좋겠어요 - example: 집에 곧 갈 수 있으면 좋겠어요. = I hope/wish I can go home soon. 네가 여기에서 있으면 좋겠어요. = I wish you were here. (I am not a native speaker, so this is my best try. I am learning just like you.)