Him leaving is the biggest act of love he could show you because you aren't right for each other. You'll thank him in a few years, believe me. For right now, all you need to remember is that it's over and you're wasting time if you question that. You have the rest of your life ahead of you, so it's time to focus on the future you're building for yourself from this moment on. Each time you think of him and feel sad from now on, you should pause whatever you're doing, acknowledge you're grieving over something from the past, and in your head say "Thanks (name), for letting me know you. I hope you have a great life. There's a stronger person out there that'll be a better fit for me, because the love of my life is not a guy who doesn't have the courage to face me and speak his mind." And go on with the rest of your day. Do this and in 2 months, you'll feel very different than you do now. Hang in there.