While her love "don't cost a thing," Jennifer Lopez doesn't let just anyone into her heart -- but Bradley Cooper's been putting in serious work. Following a cozy dinner at Per Se last month, the pair seem to be getting more serious. Sources tell Us Weekly that Cooper is "really trying to woo Jennifer in a big way." This may be just what the 'American Idol' judge needs.

Cooper and Lopez been communicating constantly. "He has been after Jennifer, calling her, for ages," the source told the mag. "They've been talking on the phone and texting a lot," another source said.

The duo has fun together too. Remember when they were spotted together last week? "They were laughing the whole time!" an observer told Us. Earlier reports let on that Lopez was "happy" following her split with Marc Anthony, and maybe Cooper is why!

"Considering how depressed she has been since her breakup, it's no surprise that she has finally decided to let him in," a source told the magazine. "For the first time since the split, she is allowing herself to go with the flow."

As long as Cooper cheers her up, we're rooting for him and Jenny from the Block.