If it must then it must, but if he still cares about you enough to try and stay friends then there's a good chance that it won't. Like I said, He doesn't WANT to hurt you. Don't give him an ultimatum, because chances are that neither of you will be happy if you do. You will either lose him entirely, or you could get him back and possibly be in an unhappy relationship because he resents being pressured. Just give it time, live your life, and let him come to you.