Bryan Tanaka has admitted it "f***ing sucked" watching Mariah Carey get close to her ex-fiancé James Packer.

Mariah Carey

Mariah Carey

The 33-year-old dancer and choreographer - who is now dating Mariah - received a "big reality check" after he witnessed the 'Without You' hitmaker "connecting" with the 49-year-old businessman when the pair were still engaged.

Speaking on an episode of 'Mariah's World' - which saw James fly to Paris to see Mariah perform - Bryan said: "It just f***ing sucks. Seeing Mariah and James connect is super weird for me because I haven't really seen it before. I feel like I've been living in this fantasy for a while and all of a sudden this is like a big reality check."

The news comes after he admitted on the reality show he was "catching some hard feelings" for the 46-year-old singer months before they started dating.

He told his dancer pal G. Madison: "I can't believe I'm saying this right now. I'm catching some hard feelings [about] Miss Mariah. I don't know if I'm tripping, but it's been kind of going a little nuts lately man.

"I feel like our chemistry is not just professional, there's great chemistry professionally, but when we talk it feels like there's a connection that is more than what we've had for the past 10 years. [I wouldn't] cross that line [if it didn't] feel the way it does."

G. Madison then tells Bryan that Mariah is in a "tough position" because of her engagement and Bryan agrees, admitting it is "a complicated situation".

He added: "That's where I'm tripping, like she's engaged so maybe I'm really just tripping."

But G. Madison reassures his friend, telling him: "Or maybe you're spot on."

Mariah - who has five-year-old twins Moroccan and Monroe with her ex-husband Nick Cannon - has been dating Bryan since she split with James in October.