PENNSYLVANIA: Bradley Cooper is planning to marry his girlfriend. The actor, 39, plans to propose to British model Suki Waterhouse, 22, this summer. “Suki is aware that Bradley wants to marry her, but he’s keeping all the details of the proposal top secret,” says a pal. “Suki is the first woman to come along whom Bradley can really picture a future with.” The friend adds that Bradley is on a tight time frame. “He plans to start trying for a baby before they even marry. His goal is be a father by the time his 40th birthday rolls around,” said the source.–SH