Most Helpful Guy
How about answering the question yourself with these questins:
1) how long do you expect to be with the person? A year? 10 years? Or a life time?
2) how long does it take to discover a persons flaws? A month? A year? Few years?
Note: if until now he's flawless, then you have not known him.
3) how long does it take to form love among yourself? A month? A year? Few years?
Note: love is not about how much you benefit from him, but how much you want to give go him, including your life; and vice versa.
Answer the above questions, honestly and define your own time period. You'll then know when the relationship is to become exclusive.
Most Helpful Girl
Depends on the actual time you spent with that person in 10 weeks time. I would think after you spent a lot of time with someone you would both know if you were going to be exclusive or not.