But some people are happy that way. I remember someone saying about Ronald Reagan, "He was lonely if Nancy wasn't in the room."
If both people want a lot of togetherness, it's good. If one wants to be always close while the other needs more space, it's difficult, but can still be worked out if the people are really committed to considering the other's needs as well as their own.
Oh I understand that, and its better if both are honest beforehand so they aren’t missmatched.