Hi Uzi,
Elden gave you an excellent answer (thumb up).  Assume that you married your ex and found out that it disn't work, ending in an ugly divorce..... So, please be happy with waht you have, re-ignite your marriage, improve it..... if you can't do it by yourself get a marriage counseling.  You didn't say your husband is doing something bad / wrong so my impression is that you are bored.  Attend to it !.  Don't live in the past it will kill your bright future.  Always think possitive and don't give away a bird in the hand for 2 birds in the bush. 
Best regards,