In my opinion, I don't think dating at this point is a good idea. From what I've read you have had a difficult time breaking off your connection with your ex. This relationship was toxic and unhealthy. If you go straight into another one without doing some work on yourself (finding out why you stayed with the man you did) you will repeat the pattern.

This guy may just be a younger version of your ex.

I see nothing wrong with dating a younger man when some time has passed and you are 100% ready to have a healthy relationship. Enjoy the attention but don't go there.

Your right, it would be a rebound relationship.
Kate