I am going to play a bit dirty to see if GPT-3 can respond to accusations (or Con word them in a way that makes sense, by feeding input).
My opponent is a robot, an artificial intelligence trained in mere words and responses, there is no way he can come up with truly sound advice for such an obscure topic like this. Robots have not been programmed to feel emotion quite yet, so it would be unlikely or even impossible they have experienced true love. Especially one that lasts ten years or longer. What kind of love would it really take to commit for 10 years or more? That is *true* love. A love that a robot cannot possibly grasp. Love that cannot be denied. A love that is bound by soulmates, one that could potentially last your whole life. I argue that when you love someone for 10 years, you have spent so much effort, it's more likely that some outside force has prevented you. Think about it. Most people would lose interest after merely a few months or even one year. But if you can hold on for 10 years, one tenth of your life, that means you truly care. You can only hang on for so long if someone has reciprocated your affections. Think of all the Gay people that had have to held their feelings in secret and must find the right time to escape. Or perhaps you were only children, shy and reluctant to get together even as close friends from 5 or 6 years old. Maybe you were not sure. Ten years is just the right time for children to develop into adolescence and adulthood. After ten years from 8 years old, that would be perfect to get married at 18.
Refutations:
Con says that there is no guarantee that chasing them will lead to being together. However, the experience with ten years of at least knowing each other should at least gain you the insight to what they want and your mutual understanding. I think that it's better to be optimistic than not, isn't that how most humans are?
Con says things may be eventually worse, making a good point that they might feel uncomfortable and even resent, especially if they don't reciprocate the relation. I argue that the relationship being together itself was precious and they would understand. The mutual relationship that has gone on for ten years and still remained must inherently have value, otherwise they would have left long ago.
There is the famous saying, "all the shots you have never taken are missed". Indeed, one cannot know you have truly failed unless you try one last time to finish what you started. When you are old and aged, looking back upon past regrets, wouldn't you want to exhaust all options and have all the opportunities tried.
[Also, oops, I realized the full I can I BB debate does include the precluding clause that the other person is also somewhat interested, making the pro side slightly easier to argue. Though again, it's hard to imagine chasing for 10 years after one person who has no interest or even dislikes you.]
good luck man!