If you are on your second (or more) marriage and in crisis, this post may be applicable to your situation. I would urge you to consider getting some outside coaching, counseling, or mentoring to find out what weaknesses in yourself are tripping you up in marriage. The fact is that you have been half of every marriage that you have been party to, and even if you are the one getting rejected, or sinned against, it would be helpful to figure out why you are picking the type of people to marry that you have been.
If you have a major addiction that you have not dealt with now would be a good time to do it. Doing so might save your current marriage – and it would be shortsighted to enter another marriage without dealing with that addiction.