Ok, here's an update...
I went to the gym this Friday and it was a trainer day.
Even though I know that I shouldn't repress my feelings, there is something very helpful about setting aside feelings for an hour or two while focusing on something else. The hurt in my shoulders and my arms is something that I can relate to immediately and the weakness in my arms is something that is very present.
I have had a little bit of time to think about things. It isn't my fault, but that doesn't mean that I am certain that I couldn't have prevented it. I can't help but be irritated at myself for that.
Right now I'm splitting my time between sitting with my feelings, not allowing myself to get mired into them, and trying to think of how to keep this from happening again.
The feelings involved are pretty unpleasant to say the least. Anger and hate(two emotions that I do separate, though they do feel very similar) compete with a lot of sadness and hurt. The thoughts come and go as I sit, waiting for the thoughs to die down so I can rest. Unfortunately the thoughts right now have a lot of momentum, but that just means(in my experience) that I just need to sit a bit longer. As per my religious tradition, I try to dedicate the hurt in the following way, "May my feelings of sadness, hurt, and anger be dedicated to all those who have suffered in this way so that no people may suffer in this way ever again." I know to someone who is not of my tradition it sounds odd, but it does help and it is something I feel very sincerely. Not only do I wish that I didn't feel this, but I wish that nobody would have to feel this.
I'm also trying to keep busy so that I don't let the feelings overwhelm me and go into a full depression. I got some more straightening done around my apartment, I have another gym visit planned for today, and am planning on getting some laundry done. To the outside observer this might not be a lot of stuff to do, but as someone who(long before this happened) was diagnosed with depression, it is significant in regards to keeping the "Black Dog"(as Churchill called it) at bay.
I've found everyone's responses very helpful in this thread. Thank you for providing them.
I think the one good thing to come from this is that my want for another girlfriend has dimmed quite a bit and sex from anyone isn't even a concern and probibly won't be for awhile.