Williams joined Oxford United on loan in August and in December had his stay extended until the end of the 2013-2014 campaign.
The winger has made 38 appearances for The U’s, with 32 in League One, and has scored six goals and set up five others.
Williams, 20, said he has been happy with his form.
"I’ve been playing well and getting minutes, goals and assists under my belt, which is the reason I’m here," he said.
Williams has been a regular starter on the right wing for Gary Waddock’s side, with the occasional appearance on the left flank.
However, Oxford United have endured a barren run of late with just two victories from their past 10 matches.
Waddock took over The U’s in March, after former boss Chris Wilder left to join Northampton, and the club has dropped from first position, at the end of 2013, to seventh place.
Oxford United is just inside the play-offs, one point above York, and Williams believes a combination of things can be attributed to the club’s poor form.
"I’d say a couple of injuries but I think it’s mainly the fact that we haven’t got out of our losing streak and conceding last minute all the time kills us," he said.
"I think we can go up definitely and if we keep playing as a team like we did Saturday against Plymouth we should."
Oxford United beat Plymouth Argyle 2-0 on the weekend to move back into the play-off spots and now face promotion rivals York in a massive clash on Good Friday.
"I think every game you want to win but this one especially because they are so close behind us," Williams said.
The 20-year old Perth product has been in close contact with parent club Fulham and believes he is ready for a crack at Premier League football.
"After every game they contact me and ask me how it went and every now and then they come and watch," Williams said.
"I think (I’m ready), but you never fully know until you actually play and find out what it’s like."