The couple split on camera last year - just as Lockie had been about to propose - but reunited during the 17th series of The Only Way Is Essex after an eight-month break.
Speaking ahead of series 18 starting this weekend, Danielle said: "Things have been going very well. It's a different relationship - more mature than the last time round.
"We've both realised our faults and having the break helped us. We still bicker, of course. We had an interview yesterday and we were squabbling during that! That's us though - and we still love each other."
Danielle also hinted the pair could be moving in together when answering a question about pets.
"James has been telling me he wants a dog - but if we're moving in together the dog needs to be small. I can't be cleaning up after it all the time!"
Danielle and Lockie - who recently starred in a sexy photoshoot for Reveal magazine - are in the midst of arranging a double date with Megan McKenna and Pete Wicks when they all have time.
Megan revealed this week they'd book time in when everyone was free. Pete is Lockie's best friend, while Danielle has become great friends with Megan.
"Megan joining the show and getting it on with Pete [was the most exciting moment of series 17]," said Danielle. "It made great TV. We needed something a bit new and she's very fiery. I was excited to see Pete have a romance and her entrance was an exciting moment on TOWIE."
TOWIE begins Sunday, 17 July at 10pm on ITVBe.