Octomom -- I'm Single ... AGAIN

Jennifer Aniston and Brad Pitt, Tom Cruise and Katie Holmes, and now ... the most SHOCKING break up of all ... Octomom and Frankie G have officially called it quits.

Sources close to Octo tell TMZ, Octo has decided to end their love affair, after almost a whole three months of dating.

Sources tell us ... the mother of 14 ended the relationship a few weeks ago because she has way too much on her plate right now and just can't make time for a serious relationship.

In case you forgot -- Octo is currently juggling various XXX gigs, launching a singing career, getting kicked out of her house, and of course ... caring for the livelihood of many, many, small children.

We're told Octo realized early on that 23-year-old Frankie G was just too young to handle her fast paced lifestyle ... so she had to cut him loose. Sources tell us they still remain friends.