The 34-year-old socialite, who met the Swiss businessman in Ibiza earlier this year, said she could not be happier as "great things" are happening, reported Hello magazine.
"I'm really happy right now and that's all I can confirm. This is turning into a magical, marvellous summer. Even though Thomas isn't Spanish, I have to admit that really great things happen to me in Spain. Life smiles on me here," she said.
Though she did not want to talk too much about her relationship, Paris is convinced that she will get married and have children one day.
"I love children and I am sure I will become a mom. I have that very clear.