SadCat...he tried to choke you. This is as serious as it can get. He could kill you...abuse gets worse over time...so does alcoholism.
I suggest th at you call the local domestic violence organization and talk, confidentially, to a worker....get their advice....
Also, get yourself to a support group as soon as you can locate one...alanon is the obvious one.....and, you need your own counselor, in addition.....
Cut off all contact with him....including his friends!! do not talk to his friends.
You are going to feel sad for a number of weeks to months....but, you will gradually get over it...You will mourn for a while, so expect it....it is normal,
short-term pain for the long-term gain.....
You are the one who is responsible for your own welfare and happiness....