You didn't give enough to advice specifically, but I can give some general. Check the Bible for what God's word says. Do a word study on Marriage and Divorce. (If you don't know how, grab a Strong's Concordance and a Vine's Expository. Between the two they'll give you many scriptures on the subjects. You can get them, and then some, for free through eSword.net. You'll also need to download a KJV+ version of the Bible, just to go along with Strong's concordance. Might want your preferred version too, if KJV vexes you like it vexes me. lol)
Let the word speak to you. This helped hubby. He was married before and truly believed the "until death do you part" part. The first time he studied God's word, it taught him to stick with her. (Bold, since she cheated on him.) The second time God released him. (She did it twice, but he was willing to stay, if that's what God would have him do.)
God's word is like that. If you are open to hear him through it, he will give you the answer he wants from you that time.
And, if I didn't study it on my own, I would have had a serious problem marrying a divorced man. (Doubly serious, since I was already head-over-heels in love with him.)