Making the decision to do it is the hardest part, I think.
You sound like you've been through quite the wringer with this marriage, and just putting it out there with your family and friends, hopefully with time they will be able to forgive. You have to start somewhere, right?
I always had the hardest time saying "I'm sorry" and being sincere. Once I started, it became easier. You can do this.
"Everyone you meet has baggage. Find someone who loves you enough to help you unpack." ¤Formerly DelinquentGurl¤