I want to say "shame on you", but being a woman myself I can understand that our emotions sometimes get the best of us. But still, "shame on you!"
You have to keep telling yourself over and over all the reasons you should not talk to him. Like you said, you are
fresh out of a relationship, your emotions are raw and sensitive, you have to toughen up to these types of situations with men.
ALWAYS think of the other woman, put yourself in her shoes and remind yourself what a dirtbag he is. How could you not think about her when you were 'with' him. What if it were your man and he did this to you behind your back during your very weakest moment in life? I think this guy is bad news altogether and every woman needs to run when he comes near. Please don't give in, you are 25 and now single, take this time to get in touch with yourself and to contemplate what you want out of life, and I am sure that being with a guy like this is not it...you have so much to look forward to, you have a future to start planning for, and
do not make him a part of it.
One thing that worries me, you mentioned that you went out to
"find new prospects", please don't think that you need another man to replace the one you just split with...be independent for a while and enjoy life...think about the characteristics you want in a future mate, don't settle for just
anyone, even if just for 'play'. I don't know what you meant by that, but I wanted to add my 2 cents just in case.