Good Morning
You did the RIGHT thing for YOU. Good for you, dont second guess yourself. As Dandy said, I'm sure your living with HIS alcoholism wasn't in your " plan ". If he's serious about getting help for himself he will do that whether you are with him or not.
Get yourself into some Alanon meetings, take some time for you to get your head on straight. Sometimes we all just need a little space and breathing room to see exactly what has happened. Believe me, I'm 1 1/2 years out from leaving and I still reflect back and think " Huh?"
You'll be fine... Chin up!