the important thing to bere in mind, is you chose to kick this guy out of you emotional life for a reason.
now i think in a very scientific many. so i must beleave that there is always room, in any cercumstance, for change.
having said that your feelings now could just be nostalgia. if so you need to stand by your previous desition, if you dont, you could caurse great damage to your self worth, and (*could*) spiral down into much worst situations than you could imagen.
but if you truly think he has change, not think you can change him, great, do your thing.
you also got to remember that no matter what, any thing that you do has to be your decision, not anyone else. take advice, dont take advice, but never do what others tell you to. yer take the infomation you hear from others, and compile your on plan for what you think is best for you.
people who make snap decisions for you, based on very little first hand evidence, need to accept they're ignorence. i know im ignorent to the situation, therefore the only advice i give is probability of your feelings to the scenario.
he may be an arsehole, but i just dont know.
stand by your feelings, do what you think is right, but if nothing has changed since when you made your decision back then, stand by your decision now.
much love
Dox