I've been dating my boyfriend for a year and uh...3 months, so that puts me JUST into the 1-3 yr category. We started dating (officially) on January 13th last year, so sometimes our monthly "anniversaries" fall on friday the 13th, and it's fun
My longest relationship was just over 4 years.
(P.S. We don't celebrate monthly "anniversaries", but it amazes him that I like to be with him, so he'll remind me every month anyway.)