Leonardo DiCaprio and Blake Lively’s relationship is heating up fast — but the hot Hollywood hookup may not last much longer. According to insiders, Leo and his lively love interest are more different than they are similar. Even though the duo recently enjoyed touring romantic cities like Cannes, Monte Carlo, Monaco and Venice, the whirlwind might be coming to an end.

“Leo is back in the States, and he’s going to go back to his old habits,” says an insider. And the notorious bad boy’s habits include late nights out hitting clubs and parties. The problem? “Blake doesn’t like to go out,” the insider says. “She’s never been into the party scene. She doesn’t like going out, dancing and loud music. She’d rather stay home.”

The source adds, “Blake can get really insecure out in public. It’s one of the main reasons she hates going out.” Leo, on the other hand, “loves to be out at night, and tends to hit clubs and parties almost every night.”

And the difference in their social interests has the potential to stand in the way of their blossoming romance. “Who knows what’s going to happen?” adds the source.

It’s a big change for the Gossip Girl star, who was recently spotted trying to keep up with her new flame, leaving NYC hotspot The Darby late at night. “Blake and [her ex-boyfriend] Penn Badgely stayed in all the time. They watched movies and hung out in their pajamas all the time,” the insider says. “Leo is definitely not going to be that guy.”

And considering Blake already has a nude photo scandal following her, which her rep has denied is her, it seems like a good idea for her to keep a low profile and avoid the party scene. To that point, we hope Blake stays true to herself instead of getting wrapped up in Leo’s wilder ways!

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