A sense of comfort is the main point that you will feel when you've met the right partner. Instead of always being filled with the same interactive discussions and activities, sitting together despite being busy with each other's world will still make you feel at home next to him. Maybe you're doing your college assignment, then she accompanied you while reading her favorite manga.
Although there is no conversation between you, you remain calm. Because for you are happy it is simple. The existence of a permanent partner makes you happy even though both of you are not doing the same activity.