There might be various factors that have led to what your relationship is currently going through. It might just be one or several of them. It might be that you grew out of love.
In the current situation you're in I would advise you to stop any communication with your partner. Let your partner know you need time to be alone with your thoughts thus you shouldn't communicate with each other until you feel there is a reason to do so. When you don't communicate with your partner, it will afford you time to reflect on the relationship without letting emotions assist you in analyzing the relationship.
It is difficult to think clearly if you're still in contact with your partner. You need ample time, not one or two weeks but preferably a month. You will have cooled down, in control of your emotions and able to analyze the relationship soberly.
At the end of no contact rule or when you feel you should cease remaining silent, you will have known whether there is a chance of reviving the relationship or move on.
But from the way I see it, there is no point of reviving the relationship as it will not be in its former glory. In any case, it is better to exercise no contact rule for a minimum of one month.