Why not say the following when you two meet up ' Before you say anything, I have the feeling we are just not as happy as we used to be together. If you are here to tell me you feel the same way and have had enough, lets just end this amicably and both get on with our lives.' If he then says he doesn't want to break off with you - and you do want to give things another chance, then simply tell him how you feel about what has been going on lately. If he really does want to hold on to you, he will agree to change things. If not, no harm done. By approaching him, as I suggested above, it takes the heat of f the situation and in a way the wind out of his sails. This way, he won't be on the defensive and, in a way, you both will have ended this relationship and nobody need to feel the looser. Hope it goes well for you.