Brian Austin Green and Australian Maxim Model Tina Louise Break Up

Brian Austin Greenfirst legitimate message fromMegan Fox the rebound is over … we learned that it was separated from the Australian model Maxim Tina Louise.

Sources close to Tina tell TMZ … that the short-lived relationship officially ended this week, when she broke things up with the ‘90210’ star.

Several factors doomed the former couple … we are told Tina received a lot of hate on social media from both Megan and BAG fans. Sources say the bullying was disheartening and really affected her and certainly played a role in the breakup.

It wasn’t a good time for Brian and Tina either … we are told she realized he didn’t want to settle down after separation of his wife, and Tina is looking for something more serious.

As we reported … Brian and Tina started seeing each other last month, with a Taco Tuesday noon helping her try to get past Megan.

Our sources say Brian invited Tina over to his house and introduced her to his best friends, but things just didn’t work out.

We’re told Tina still thinks BAG is a great guy going through a tough time who needs to focus on himself … and while they’re still friendly, they take a huge step back.