Good advice from potkettleblack and farrell. When I started to fly you had to option of the military or the likes of BA and Aer Lingus sponsored cadetships. If you failed to get any of those you were supposed to give up and just build model aeroplanes lest you be dubbed a Walter Mitty. I certainly was!
But some of us continued our Quixotic quest to earn a living as pilots, hoping one day that the mythical pilot shortage would arrive and sweep us into the skies. Well, there never was a pilot shortage (and never will be, except in the minds of flying schools who actually worry about the persistent student pilot shortage) but somehow most of those who persisted contrived to end up flying for a living.
As it was, so it ever will be.
So if you want to be a pilot, go for it. But keep the back up but boring job. Then one day the long awaited letter of offer will arrive and you will leave your suprised colleagues toiling at their keyboards as you set off for destinations known and horizons cloudy.
As they say, 'On your deathbed, you won't regret the things you did, only what you didn't do.'