Best speak to someone you're close to and try not taking advice from people saying 'trust me' and it's 'normal' to think about suicide; because it's not normal - trust me on that.
If you want to run to the bridge, then feel free - you'll be a burden to those who care about you by thinking such extremes. Thinking you'll be useless, you will be useless.
However (I know you seen it coming), as andy_c has said - you're relying on input from Any-mouse people on an internet forum. Would you really take anything any of us said as your course of action?
You most definately need counselling if you're thinking of killing yourself. But it can be overcome, with good prospects/ oppertunities at the end of it - if you stay here long enough to fight for them.
How long have you been interested in this said career path? A career, though fundamental in ones standard of living; with the chance to travel, meet like-minded persons, have a meaningful job where you are respected is not the be all and end all. What would you have done should you never been able to participate in this career? If at an early age, you'd have ben upset - then decided you want to be an astronaut, or the likes. Simply because it's came at a later stage in your life, doesn't make it any more a sore-blow. But it is nothing more than a sore-blow, and can be recovered from.
Best thing for you buddy, talk to a friend. Or if you don't have any friends, get some, and talk to them. Then go speak to a psych and get yourself sorted out.
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DO YOU LOVE YOUR HARDCORE?