H.B.
I don't know where you live geographically, but I appreciate the fact that you want a church to connect with and a body of believers that can help you find God's will for your life. I don't know what your situation is in the marriage, but you have children with someone else. What does your husband think? Find a church that will preach the gospel, from the Bible. What God tells you to do may not be what you want to hear, but talk to your husband and father of your children and read what the Bible says about marriage and commitment, and pray for guidance. Find a Bible believing church, not necessarily one that says what you want to hear.
I go to a Wellington Presbyterian Church in Wellington, (Presbyterian Church of America denomination). There is also a PCA church in Lake Worth, Lake Osborne Presbyterian. These churches will love you and listen to your questions and help you seek God's guidance. Sometimes the answer is a difficult thing to do, but the right thing.