I'm sorry you're going through such a rough break-up, and that the last interaction you had with you ex left you feeling so low. If you haven't already done so, I encourage you to give this article a read and pick out some things you can try to help you cope with the break-up: Getting Through a Breakup Without Actually Breaking
. Beyond that, how can we best help you right now? For instance, are you looking for specific advice our resources, or are you more in need of a space to vent?
While some people do manage to maintain happy, healthy friendships with an ex, you've unfortunately found out the hard way why trying to have that kind of relationship immediately after breaking up usually doesn't work out so well. Friendships with exes are often most successful when both people have had time to move past the break-up and any remaining romantic feelings for the other person. Recognizing that it wasn't working for you to be friends right now was actually a very sound move on your part, and it was much better to be honest about it than continue to do something that was making you unhappy.