Keep him. If he is having a mare, find out why. Could be the supply, it could be the tactics-it could be his role that may need changing. And he's still young too so he can still improve-get someone to tutor him. I'd keep him and give him a chance
He is very good if you play a winger tactic, unfortunately one of my biggest problems on my past Liverpool saves is that Suarez and him just don't click.
Set a nickname for him as Stevie Gerard and then offer him out, try and confuse other teams into making a bid! All you can do is set his transfer value to £0 and offer him out for free to get a bit of interest. When people start coming back with offers of £0, reject them and say that the offer was not good enough. Then offer him out to clubs again at a bigger transfer fee.