OK! Magazine is reporting that Jennifer Aniston turned down boyfriend Justin Therox's marriage proposal on their 2 week getaway in Europe!

"She feels like she only got the proposal because she pushed for it. She doesn't want a guy marrying her because he feels some sort of pressure." Jen was even expecting it too!

"When it didn’t happen Jen got upset, so they started bickering. They fought about his commitment issues and she brought up a bunch of stuff. He got defensive and stormed out, it was a big mess. They made up a few hours later, but it still ruined the mood of everything." Then Justin felt stupid and decided to go for it...

"Justin totally shocked her and proposed. She told him she loves him and wants to marry him, but she couldn't say yes. She wants everything to feel right, not rushed. She told him she feels like he’s not ready, but she is willing to wait for him."

Phew! Love them together... I'm sure when the time is right he will knock her socks off!