Hey Mystery,
It's hard but you have to start working towards accepting that it's over. Life goes on and I think the best way to move forward is to carry on living the way you did before. Keeping in touch with friends, socializing, and anything else you do with your spare time. It will keep your mind from thinking too much. Don't go looking for a relationship if you're not over the last one because you will then find yourself depending on that person to make your life feel complete, even if they are no good for you. Just enjoy your time right now, think of it as freedom instead of loneliness. Do things you want to do, go to places that you've always wanted to visit, see the movies that you want to see. Sooner or later you will meet someone and if you can learn to be happy within yourself, it will increase that chances of your next relationship working out.
I met my wife about 4 months after a bad break up with someone else and it came totally unexpectedly. I'm sure it will happen for you too but for now, try to enjoy some time to yourself and with your friends. Hope this helps. You can send me a PM anytime if you want to talk
Nathan xo