In a brief post on her MySpace blog, the 22-year-old actress wrote: "We did NOT break up!"
Lohan asked several media outlets "AND every GOSSIP website" to get their stories straight.
The "Mean Girls" star also complained Monday that her friends had been e-mailing her to console her about the rumored breakup with the 31-year-old Ronson. The pair had confirmed their relationship last September.
Lohan's publicist, Leslie Sloane-Zelnik, didn't immediately respond to a message seeking comment.
