Most Helpful Guy
If you dumped him. Then talk to him. Take it slow.
If he dumped you. Then no. Wait for him to miss you. That can only happen with him reaching out to you first.
In the meantime, improve yourself. Get stronger emotionally, look sexy physically. Go to the gym, get new clothes. Be and look your best. He will notice. Act like its no big deal. Look happy. Make him think you've moved on. He will long for you only then.
Most Helpful Girl
What do you think that would accomplish? You clearly broke up for a reason, do you honestly think things will be different if you get back together? Telling him you miss him will only trap yourself back into a cycle and stop yourself from being able to move on. Ultimately, it's up to you, but I don't think it's the best idea.