At first he wanted to share mine with take, but then he saw the possibility that mine and take might start liking each other more than him. In short he was a little jealous and regretful of bringing them together (literally). I think he started getting a little understanding that you can't really share someone you like although in the end all three stayed together.
Finally, Bree. Someone who gets it. No, their relationship really did not change. The realization that this manga originally seemed headed for was completely disregarded at the end of it.

hmm is this really completed? y did i felt like hiroi wanted mine to himself and i was sure that the story will go on like they hiroi and take will fight over for mine?