The 30-year old Hammers star admits that his performance in the Euro2012 qualifier against Wales in March strengthened his chances to be involved with the Three Lions further down the track.
Ahead of Saturday's Group G clash with Switzerland at Wembley Stadium, Parker says he is looking to contribute even further to the England setup after gaining more confidence.
"That particular game against Wales was a massive chance for me," said Parker. "If I hadn't performed in that game, I possibly would not have pulled on an England shirt again.
"That is how I felt. In football, especially at international level, opportunities come along and you have to grab them. That was certainly an opportunity for me which I had to take. My England career had been very up and down - I had been involved in some squads, and not in others, so it had been very patchy.
"But I do feel that, over the last few months, I have gained confidence. I feel a bit more part of it and that is pleasing. My aim now is to be there come this time next year. I know there is a long way to go and things can change. I need to keep performing because there are so many players behind me, for club and country, who are willing to take my place. But I know if I maintain my form and focus, good things will come of it.
"That is what I have to do. If I can help in any way, that is what I will try and do."