Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
He needs to read this:
http://www.lindajmacdonald.com/HOW_TO_HELP_YOUR_SPOUSE_HEAL_FROM_YOUR_AFFAIR--ljm2.doc
Eye opener!
If he is willing to be honest, provide full disclosure, and commit to your healing then there is hope.
Although I think losing love for someone takes a long time or be even impossible in certain cases, I do think that we do eventually lose respect for partners that treat us poorly and has morals that just simply do not match up with ours. And I think once enough respect is lost, the relationship is irreversible.
So I think maybe instead of punishing yourself for loving him, if you could asses your respect for your partner as you find out all the ways he's violated and disrespected you, it may give you a clearer perspective.
Best of luck to you. I can very much feel the pangs of what you're describing. Hope you're taking care of yourself.