Sorry if this is not a real answer, but please think for yourself if your marriage was with your own agreement:
(1) if it was not and you were forced then your marriage would be up (without requiring divorce) as soon as you confess you were not pleasant from the very beginning and were forced by your parents or else. Aqd (marriage) does not hold unless the girl and boy themselves agrees both "each other" and "the conditions for their marriage" (like Mahr and etc.). See the following Hadeeth from here for example that says Aqd does not occur unless the girl would allow:
امام صادق علیه السلام: تُستَأمَر البِکرُ و غَیرها وَ لا تُنکَحُ اِلاّ
بِاَمرِها. وسائل الشیعه، ج 14، ابواب اولیاء عقد، باب 9، ح 1.
(2) if it was, then let me bring you an example of a way Satan usually influences the human being. Suppose you have a repository full of old stuff you never use, you decide to get rid of a number of them you cannot imagine that you may ever need them. Then you give it to someone who needs it and suddenly tomorrow you find a gap in your tasks that doesn't fill it anything but the stuff that you have just passed it to another guy! Somewhat a kind of Murphy's law! Satan tries us not to commit a good deed but then if we did it he will try to make us sorry for that, so you see people who never put anything out from their repository with the fear that they may need that one day! Now about Marriage. I had a similar situation and have seen many who had a similar position. Let put it this way. I was looking for a wife with my ideal characteristics for almost a long while, I had many different choices for a number of years, then I chose one and forgot the others. After I married my wife the first strange thing was that I have no other choice, so at any situation I was thinking what could be the situation if I had been married with another one among my choices. Of course Islam does not limit me (a man) to one wife but I see this is the way Satan influences the human kind. Hope that you can see the point.
NOTE: I'm not a scholar, see my answer merely as a probable answer, but visiting a scholar may be the best that you can do for now.