I have been single since I left my predecessor, and he has been single for more than a year. What's the point?

You may need a cooling-off period, or you may encounter something inappropriate. Just because you are single or the other person is single doesn't necessarily mean that you have the will to get back together. Even if you have the will, you'd better see why you left in the first place. If the reason for separation still exists, don't look back, it will only cause another separation and hurt you and him again. A cautious start, no casual breakup. Be careful with your feelings.