You can't.
One of the requirements to get married is to rescue the Harvest Goddess. To do that you must find 60 Harvest Sprites. You have to complete every single marriage requirement. There is no way around it.
There are not that many Harvest Sprites in any of the PSP Harvest Moon games. The only Harvest Moon games to have that many Harvest Sprites are for the DS.
She will only consider your proposal in year 5, after you have gathered all the 60 Harvest Sprites.
it is the same way as harvest moon ds you buy the blue feather, get 60 harvest sprites and propose you have the wedding in a week. by elimac3
it depends on what harvest moon your talking about.
you befriend the ones you have
The Harvest Sprites will never work for you.
There are 7 sprites in harvest moon: friends of mineral town.
There is no cheat for all the harvest sprites. You have to earn them all.
There are no sprites specific to the island.
you befriend the ones you have
http://www.fogu.com/hm6/chan3/sprites/index.php copy and paste this link, and it will lead you to find all the harvest sprites, and the rest of the site willhelp you with everything else on Harvest Moon Cute ds (and Harvest Moon ds)
To Marry Somebody in Harvest Moon DS/Harvest Moon DS cute you must complete ALL of these requirements.1. Your own a Blue feather2. you did all of that persons Heart Events3. you own A Big Bed4. they are at red heart color5. you have found At least 60 Sprites.