Birdie Bonding

I have had my 9 year old male Eclectus for almost 6 months now and I don't feel like we have really bonded at all. I work full time, and during these 6 months I have been pet sitting a lot and have not been home so my boyfriend takes care of him. I knew he was coming to me at a bad time and I wouldn't be home for a of the first few months that I had him but I had no other choice, he kind of got dumped on me. I would try to come home as much as I could to feed him dinner and let him out and just hang out with him, and I am home now and trying to spend as much time with him as I can but I also work full time. I just don't feel like we have a relationship, and I know that these things take a lot of time especially since I haven't been home, but I was wondering what are some things that I could do with him to help him have some sort of relationship with me? He will only step up for me if I have treats, and will really only come to me if I have treats. he is also a very independent and lazy bird. So his perches are in the family room and his cage is in the living room, I just didn't have room to put it all together at my house now. I frequently bring him out and into the family room where we hang out most of the time and he used to talk up a storm in there but he has recently stopped talking while we are in there. He will talk and make a whole bunch of noises if he is in the kitchen, but I don't know what to make of this. Is he all of a sudden uncomfortable in this room, or uncomfortable around me? Or could it be the tv? Anyways, thanks for reading this far, my main question is how can I build a relationship with him other than just sitting and hanging out. Or is that all it takes with time.

My birds talk when caged not with me, to lure me into letting them out! Now I've taught them to say come here..lol maybe not smart cuz I hear a lot of come here come here when they want out ( all the time!) Two haven't learned come here yet so they say hello hello... There like hey I'm cool and funny I can talk! That could be what's going on with you. He's talking to get your attention do you will bring back with the flock. Not because he is happier alone. That's my take based on my experience with my birds...
https://petcentral.chewy.com/think-your-pet-bird-hates-you/

I link my favorite two articles
https://lafeber.com/pet-birds/bird-behavior/

https://lafeber.com/pet-birds/stress-reduction-for-parrot-companions/

On my Ornithology thread under general parrot info page. On page 9 of my thread I have a bunch of articles on bonding with scared parrots if you want to check it out.

I'm certain one of our eclectus people will know for sure, but I am pretty sure I remember reading something about them having very specific dietary needs, and in general, a lot of bird behavior is based upon diet. Hopefully one of them will be along soon to answer more definitely.

As to only coming to you/stepping up when offered treats, perfectly normal and in fact great progress for a bird with limited interaction over a 6 month time period, keep associating your hands with food, good things will follow.

Before answering anything, what kind of interactions are you hoping for? Understanding your expectations of him would enable more insightful and perhaps actionable answers.