I'm so sorry you needed to find us here but so glad that you did.
Going to the Alanon meeting is a wonderful idea--go as soon as you can, and attend several different ones, as they tend to have somewhat different flavors. You will feel welcomed and understood.
Your A has treated you horribly and you do NOT deserve that. Take care of you and you'll find you're worth much more than you thought. I seriously doubt that this guy is "the best thing that ever happened to you."
I'd like to suggest going to the "Friends and Family of Alcoholics" section of this forum to do some reading and posting, as you will find your best support there, from others in your shoes. Also, if you can, take some time to look thru the "stickie'd" section of that part of the forum for information, hope, and reading material.
Again, glad you made your way here, and wishing you strength, hope and clarity!