Losing is always hard. There is never a good feeling that is normally associated with it. Thoughout my life there have been times that I have lost and continue to lose.
The only thing to take away from it a lot of times is the knowledge of the loss, the character building aspects of it. The parts that make you stronger, and keep those with you. Just don't see the loss as a loss with no gain.
I just recently read something I wrote over a year ago, to myself, about my wife. In it I said that all the years I was alone, had all the rejection, the heartache, and fear that I would end up alone made me who I was. It made me better for my wife and more appreciative in an odd way that she was finally around.
There may be times that she drives me nuts, or does things that I don't understand for the life of me. On the other hand, I wouldn't want it any other way because I already know how that is, and how much I don't want that.
The road to success is build with the failures of the past. Failure isn't a roadblock, it's another brick in the road.