I guess this time I am thinking a little to much when its comes to an end where you have to make a decision between me or 'that person' .

Logically you can't have 2 special person in your life. You only able to choose one. What happens when you have 2 ?? First ,you will thinking who to listen then you have make a choice to tell everything to 1 person only and just let another person alone, you will tend to feel another person as a disturbance in your life and all sort of things.

That's why you only get married to 1 person right ! That's a fact indeed.