On Saturday, 31-year-old Tina Cash of Marathon, Florida unfriended her boyfriend, 35-year-old Thomas Gannon, and switched her relationship status to single.

Thomas confronted her, they argued . . . then started taking SWINGS at each other.  Then they started throwing stuff at each other, and Tina ended up hitting Thomas in the face with a picture frame.

When the police arrived, Thomas was outside and Tina was inside.  Both of them were arrested and charged with misdemeanor domestic battery.

As of today, Tina's Facebook page shows she has 221 friends and Thomas is NOT one of them.

(The Smoking Gun)

Here are their mugshots: