Items:

1. We look forward to seeing or talking to each other every single day.
2. We share every secret.
3. We think of each other as best friends.
4. Being in a relationship should become a central part of your life.
5. We know everything about each other.
6. I want to spend the rest of my life with my partner.
7. I would like our relationship to get somewhere.
8. I can see myself with my partner when I'm old.
9. I want to spend all our time together.
10. If we broke up, it would be a devastating blow to me.
11. Everybody knows that we are serious about each other.
12. We love talking about our passions and our goals in life.

Response Options:
6-point Likert scale
Strongly disagree - 1
Strongly agree - 6