I honestly don't know as I've never given something like this much thought.
However, after reading your other posts my advice ( though probably unwanted ) would be to do a spell for self esteem and healing....for yourself.
The guy cheated on you and left you. Wanting to be with him, even after that, doesn't exactly scream self respect.
Even though my response is probably going to be unpopular with you....good luck. You're going to need it.