United Kingdom, Aug. 31 -- Jennifer Aniston's boyfriend Jim Curtis feels "blessed" by their relationship.

The 57-year-old Friends actress has been with the 50-year-old author and hypnotherapist for 18 months, and he has opened up about the qualities he admires in his famous partner.

He told The Jamie Kern Lima Show: "It's going really well. My experience of her is so grounded and so open and caring and kind and loving.

"I feel blessed to be in a relationship with someone that is so open-hearted and kind and loving. She uses words like 'my love.' "

Tim revealed he's even been getting on well with her "group of best friends", describing them as "family".

He added: "I feel incredibly blessed to be part [of] and welcomed into that family...