Selena Gomez misses her friendship with Justin Bieber.

The 'Heart Wants What It Wants' hitmaker, who split from the 20-year-old star in October after almost five years of dating, is reportedly still struggling to adjust to not talking to him every day.

A source said: ''He's been one of her best friends for so long. She went from talking to him every day and getting his advice on everything to just nothing. It's almost like she's dealing with a death because their connection was so intense.''

The 22-year-old beauty recently enjoyed a New Year's trip to Dubai with a large group of friends, including Kendall Jenner and Cody Simpson, but is still pining after he ex-boyfriend.

The insider told gossip website HollywoodLife.com: ''She's doing her best to stay positive and happy but her heart is still very broken.

''Just because she's having fun and partying with her friends it's not like she's just over Justin, it's really really hard.''

Selena recently admitted she will always have feeling for Justin, who is rumoured to have moved on with Hailey Baldwin, 18.

She said: ''I support him. I think I always will. I'm upset when he's upset, I'm happy when he's happy. I don't want anything to ever happen to him bad. It hurts me. That's all.''