Rihanna and Drake have become exclusive.

The 'Hold On, We're Going Home' rapper is reportedly the ''happiest'' he's ever been since rekindling his short-lived romance with the 'Pour It Up' singer and the couple are so smitten with each other they have decided to stop dating other people.

A source revealed to TMZ.com: ''[Drake's] in the best mood he's been in a long time.''

Insiders claim Rihanna, 26, is serious about committing to Drake, 27, because he treats her so well in comparison to her on-off ex-boyfriend Chris Brown, who left her bloodied and bruised when he physically assaulted her during an altercation in 2009.

The next step in the couple's relationship follows a series of outings together in recent weeks as Rihanna accompanied Drake in a number of locations including London , Paris and Amsterdam throughout the European leg of his 'Would You Like A Tour?' world tour.

Meanwhile, sources close to the couple claim Rihanna and Drake have been headed towards a relationship for a long while following their brief fling in 2009.

An insider told Hollywoodlife.com: ''Rihanna and Drake really have this chemistry and vibe with one another and that's something they can't explain. They're both kind of infatuated with each other.''