Sumou-sama
This is Kawaguchi Hidetoshi. This is a humble answer to the question.
Winning or losing... certainly, in our world, we often compete, compare, and evaluate, and it's something that makes us happy and disappointed when we win, lose, high, low, big, small...
However, as long as you stay within the eight laws of the world (gain, loss, praise, blame, honor, slander, ease, and suffering), Buddhism thinks that it will not change to being a “loser” (person who hesitates or suffers) in any case.
The purpose of Buddhism is to surpass such wins and losses in the world and become the best winner.
Incidentally, it is said that Buddha was declared the winner as soon as he was born. (Heaven, world, and I alone are the only ones). This can be taken as a declaration that enlightenment will be attained, but in Buddhism, it is necessary to proceed with various efforts (Buddhist practice) in order to aim to surpass this world of hesitation and suffering.
Also, things like the above can be said when thinking about “happiness.”
Question “Does Buddhism seek happiness after death?”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002979923.html
Question “I can't find a purpose to live, and getting a job is depressing”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1003004333.html
“... If you want to seek good rewards and good results in this life, you still need a cause and relationship (condition) for that. There is no way that good rewards or happiness will come by itself from somewhere without any cause or relationship. In order for seeds to germinate, water, light, nutrients, and causes and relationships for germination are necessary, and seeds alone do not result in germination without cause or relationship with water, light, nutrients, etc. In order for happiness to sprout, a certain cause and relationship is necessary, and in Buddhism, this is what becomes a “good act.” ・・”
Anyway, what will be important in your future life, whether it's love or marriage, is an effort aimed at good causes and relationships. It is only by gathering good causes and relationships that we can hope for good results. Let's work hard together.
Kawaguchi Hidetoshi Gassho