Hi everyone and thanks for your replies. I just want to start out by saying that I have removed the nest box.
I am confused because it does seem like they want to breed. Mew (my female) is in condition and whenever Ezra (my male) *********es, she comes up to him and tries to get under him. She even puts her foot on his back, which then makes him exhibit female behaviour (he squats and puts his bum in the air). Ezra constantly feeds Mew, grooms her, and sits close to her and dances around her. He hasn't ever mounted her though, even when she tries to get him to do it. I just want to know if this is normal and will I eventually be able to let them breed when they are ready?
*as a side note*
I read through all of the links, stickies, and guidelines. I took the box out and rearranged the cage, and shuffled new toys in. The birds get time out of the cage to fly twice a day for a few hours. The cage is 78 x 47 x 90cm cage. They have natural perches (eucalyptus branches, and other native woods and leaves to eat). Their diet is native leaves, fruits and veggies, and a pellet + seed mix. They have a shower every second day or so (and get misted). I just wanted to make sure I'm not doing anything wrong and please let me know if I can make changes 🙂