He really loves you, and sees you as his mate.
My girl does that too, actually. If I'm in the room and she's not out of her cage with me, she puts up a huge fuss, she bangs her toys and chirps loudly to try to get my attention, she also used to be rattling her doors so I had to clip those down further.
Budgies are flock-oriented birds, so if they have a bird flock or a human flock, they want to be with them often. What I've done is just ensure she knows that she will get let out when she's not screaming and throwing things (
); she's calmed down a bit. However, budgies will, by nature, want to chirp loudly and flock call to you when they are bonded to you.
It's nothing to worry about. He loves you
Spend lots of time with him, and when you're unable to, ignore his racket and talk to him when he calms down.