The 20-year-old Disney star has been busy with the launch of her clothing line Dream Out Loud and recently attended 2012 Glamour "Women of the Year" event where she got Independent Spirit award, reported Ace Showbiz.
"She's sad. It's hard for her," a source said.
The "Spring Breakers" star will next go to her native state of Texas with Ryan Seacrest to open a broadcast studio for patients at Children's Medical Center in Dallas.
She will also head back to studio for her upcoming album and is preparing to promote her new movie with the likes of Vanessa Hudgens.
Gomez reportedly is the one who broke things up with Bieber due to their hectic schedules that made it impossible for them to find quality time together.