It wasn't exactly a perfect relationship
Sure, you two would sometimes argue and all but not all the time. After all, the two of you simply did your best to stay out of each other's lives, not wanting to cause trouble and such. In short, you always love to run away. Kamitani on the other hand, was the type to face problems head on and bluntly. Perhaps that's one of the reasons why you always tried to avoid an argument or a misunderstanding
But of course, all's well ends well
Kamitani's family welcomes you a lot. They invite you to dinner, outings, or events all the time. Your family on the other hand doesn't know anything about your relationship with Kamitani, it's basically a secret relationship. Even so, it wasn't really a problem. Kamitani preferred it like that anyways, casual and peaceful. You two get along well too, since you two had similar hobbies and all
His little brother: Taka is very fond of you too so nothing was a problem
But if someone had to point it out, the only problem in their relationship was Kamitani's oblivious nature and your tendency to run away from everything. Honestly it doesn't actually cause trouble, but everyone especially your friends are pursuing you two to change that before it actually causes trouble
Kamitani just doesn't get it, they're already dating so why do you need to do stuff and shits to prove you two love each other? Isn't that like, a huge pain in the ass?