Hope that this is not true. Apparently Raheem is unsettled not getting any first team minutes. I have also read that he was promised first team action this season. Also some pretty somber news if true below from the article.
"To add to Sterling’s frustrations, sources close to the player have told talkSPORT that, after featuring in the Under-19s’ 6-0 defeat to Ajax in the semi-final of the NextGen series, he was told by one of the Liverpool coaching staff he is a long way off getting anywhere near the first-team."