Welcome to the community, though I'm sorry for the reasons that brought you here. Read the 'stickies' that are at the top on the main page of this forum - they are loaded with valuable, and sometimes eye-opening stories and help.
Being the father of a 2.5 year-old, my first thoughts are how does all that happen affect my son? You need to protect your little one, and you need to protect yourself.
Boundaries are not boundaries unless they are enforced. Wife and I went to marriage counseling as well. And, as people said here - it won't do a whip of good until the other issues are treated.
Read much, have faith, stay strong, and watch your back. If he hit you once, he'll do it again.
Blessing,
C-OH Dad