maria,
I was in a similar situation for 12 years of marriage. I did all I could to save the marriage but in the end I was miserable. I actually made him leave, it set me free. Yes, now you are free to be true to yourself, its a beautiful gift....but freedom sometimes comes at a cost, please please proceed slowly, heal the hurt from your recent relationship and build yourself up so that you value yourself and the gift you have to offer...
Always,
shy