He needs to sort out in his head where he needs to be at any given time, and that should come from the Manager and coaching staff.
When we are on the ball we need him central in the final third of the pitch behind the main striker. That is his best and most dangerous attacking position.
When we are not in possession, he needs to be on the halfway line, central, to shore up a midfield that needs to take staion and set up in such a way that the opposition do not progress directly through the centre of the pitch. When possession is re-gained, from that central position, he should be motoring forward to support the impending attack.
The lad is young enough to do the above, and have the brains to do so. Today, in the first half, I saw an opponent about 3-4 yards away from him, and he made no effort to bust a gut to get a tackle in, or get goal-side to make that opponent's advancement more difficult. Not working for the good of the team is unforgiveable.