'Keeping Up With The Kardashians' star and ex-boyfriend of Kourtney Kardashian, Scott Disick surprisingly appeared on the birthday party of Brody Jenner one of Kardashian's close family last Wednesday night in Los Angeles.

Indeed Disick must have developed a sincere relationship with Jenner who was then celebrating his 32^nd birthday celebration at the L.A. hotspot, Warwick. Disick was seen first to have grabbed some dinner with his boy pals in Aventine Trattoria then to the party.

Disick was also reportedly quite in a low behaviour since he was not very loud and not like his usual behaviour. Apparently as soon as he stepped in the lounge before having dinner, "girls were throwing themselves at him trying to talk to him" according to an eyewitness telling E! News.

And since he probably doesn't want any more drama in the media since he just broke up with Kardashian, the eyewitness adds that Disick "wasn't having it," and that the girls, "He kind of shooed them away."

So when Disick arrived at the party of the birthday boy, Jenner who is also reportedly the DJ in his own party reportedly thrown by Warwick owners JT Torregiani and Sylvain Bitton. Disick, still in his unusual silent mood "gave Brody a hug, wished him happy birthday and congratulated him on the gig," the onlooker continued.

It is still unknown why Disick was acting that way and one even mentioned how silent Disick was even during the party. "He seemed to be in a very somber place," says a witness. "He didn't dance, just kinda stood there. He looked really sad."

And the answer might be what one of Disick's friends told E! News "This guy is going through a tough breakup," Disick's friend said. Indeed the famous Lord Disick is indeed in a tough time with losing Kardashian and not having to be with his three children everyday.

Previous sources are even telling E! News how Disick is devastated saying he "knows he screwed up," adding, "He's trying to get his life together and that includes getting his family back. He's hoping he and Kourtney can put this behind them. He knows it won't be easy. At the very least, he wants to be friends again."