Just to perk you up a little... I know that a lot of people spend time on here moaning about life as a pilot. Remember though that the kind of people that often come to forums like this are possibly the kind of people that have problems / gripes to solve. They are only a tiny percentage of pilots fly out there.
I think i can safely say that of all the pilots I have met almost all thoroughly enjoy the job. As jobs go it's pretty perfect - you get travel the world, see the sun from your office every day, meet interesting people, and for the most part we don't work too hard!
Yes there are moments when you think why am I doing this, but that's the case with any job.
In the short-term it makes no financial sense at all. You would only invest the money if you loved flying. Once your career has settled down a bit, and doors have opened, then it's a massively rewarding profession.
Go get a gift voucher flight at a local flying club (make it an hour - no shorter!) and see what you reckon. If it's in the blood you'll know about it! Good luck!