I know that I may get shot down and crucified but I just felt that it had to be said. As Catholics if someone's marriage is not annulled they are STILL married sacramentally. Therefore they should not be dating or seeking exclusive friendships with the other sex. That is a hard message but it is the truth. When you think of it the Church does that to protect us from this heartache. Getting involved with a married man usually won't end well. As a sister in Christ who cares about you I cannot encourage you to do so with a clear concience.
I am truly sorry for your plight and I can only imagine the hurt and frustration. I am not coming in judgement but I also did not want to not condone something that we really should not be engaging in. Just keep praying and trusting in God. You are wonderful woman and he will bring the right person who is not currently married. Also married people generally need to heal from their hurt from a previous marriage in order to even have hope of success in a future one both from the Churches perspective and secular psycology. The annulement process is meant for that purpose and it even states that in the paperwork as I went through it. I am only speaking out as I hate to see people setting themselves up for hurt. God will provide a good unmarried man for you. Just trust and wait.