Doing things as a couple is the unspoken must of successful relationships. However, too often, people give up their sense of individuality once the relationships has grown—instead only speaking with "we" and "us", and giving up things that matter to them personally.
What to do: Just because someone is in a relationship doesn't mean they give up (or worse, sacrifice) their personal wants, aspirations, and dreams. Life, bills, kids and many other things can delay or alter life plans. But individuality—including interests, growth, financial independence (even if it's just a separate account)—keeps people feeling good and secure about themselves outside the relationship... which plays a part in feeling good and secure in the relationship.