When I could apply for citizenship I had already been here for many years. For me, I only needed to have lived here w/my Swede for over 3 years & a PUT.
Are you married, legally registered for partnership or living with a Swedish citizen?
Have you been married, legally registered for partnership or living together (cohabiting) with a Swedish citizen for at least the past two years? Then three years duratiion of stay may be enough.In that case your husband/wife/partner must have been a Swedish citizen for at least the past two years
http://www.migrationsverket.se/english.jsp