Physical violence is a deal breaker for me.
I too am sad that my marriage is going to end. I will cherish the happy times but will gently remind myself that staying where I am will only lead to more misery. Sure the unknown of divorce is scary, and if I focus on all the scary "what ifs" - I'll never move forward.
Instead, I focus on the good things - my future peace, sanity, and HAPPINESS. I don't know if I'll ever have another relationship, and right now I don't care. All I care about is getting out of the one that doesn't work for me anymore.
It's a grieving process to let go of a marriage. It's the death of a relationship/dream/etc. BUT, I think it's much harder than grieving death... because death is final. The person is gone. You have no choice. With a divorce, the person is still out there... and it's a choice.
Give yourself some time and be patience... but be safe.