The 40-year-old's main concern is playing regularly so that he can be in contention for a World Cup place in 2014 if Australia qualify, and Martin Jol has previously admitted that he may not be guaranteed first-team football next season.
He told Sky Sports News: "I can say now that I haven't had any official offer of a new contract. My contract obviously expires at the end of June and we'll see what happens from there.
"Nobody can be guaranteed a starting position but it is about intent and whether you are regarded as No.1 to begin with. That is what I am looking for. I love football and that is why I am still playing at the tender age of 40."
"I just try and do my job, which I have done. Obviously the last game was yesterday and now I can fully focus on Australia and try and qualify for another World Cup."
Schwarzer indicated that he would be prepared to remain in the Premier League if released.
He said: "If that were the case I'd love to stay in England. I've played here for a long, long time but you would really have to look at what opportunities are out there of that is the case.
"I am still a Fulham player until the end of June and to stay in the Premier League would be great."
Schwarzer added: "There always comes a time when people make decisions, whether you agree with them or not, and you have to respect them.
"Nobody can be guaranteed a starting position but it is about intent and whether you are regarded as No.1 to begin with. That is what I am looking for. I love football and that is why I am still playing at the tender age of 40.
"It is up to the club and, as far as I am concerned, I think I have done everything I possibly can to show that I am more than capable of playing at this level and if the worst-case scenario does come that I have to leave, then I can always walk away with my head held high.
"It would be sad to move on but unfortunately in football and in life you do have to make choices."