She is embroassing.
Often accompanied by baby talk or something mooshy, and when she thinks you are in the presence of other girls.
Girlfriend: "Ok boobiebaby I Love you"
Boyfriend: "You too"
Girlfriend: "What? say it"
Boyfriend: *quietly* "I love you too"
Girlfriend: "You Love me too what?"
Boyfriend: "I love you too boobiebaby"
Boyfriend says to his bros: "god damn she is so embroassing."