What others in the congregation think of you, you can't do much about. Don't waste your time worrying about or trying to change other people's perceptions as they will continue to believe what they want. Fiction is usually more exciting than fact.
Other JWs, while they can be friendly and welcoming, are conditional friends at best. If a JW does not fully comply with the religion's dictates, they will often find themselves criticized and/or shunned by the very JWs they thought were their closest friends.
It sounds as though you have come to realize and accept what needs to be done with your marriage, but you are conflicted by the WT position against divorce and remarriage.
Notice I said WT position as opposed to JW belief. Consider, if WT stated tomorrow that divorce and remarriage is now a personal decision, how many JWs would no longer hesitate to divorce their spouse, to find someone else.
In addition to being responsible for yourself, you have 2 children to raise and to teach. Show them you are a strong woman who respects herself, who will stand-up for herself and for their welfare.
Don't hesitate to immediately take action when needed. Inaction will usually be regretted, often for the remainder of a person's life.