1.Realize that it wasn't just you and it wasn't just him. It was the both of you. If you are willing to make changes in the way you approach the marriage, your husband might be willing to. Some of it comes down to the way you look at the situation.
2.Realize that it wasn't all one person who is at fault. “It takes two to tango” the saying goes. The same thing is true in any relationship. It isn't just one person that makes it work and it isn't just one person that causes it to fall apart. Don't put all of the weight on your shoulders and don't put it all on your husband's. Pull your weight and encourage him by example to pull his own in trying to make things right.
3.Start with where you are in life and see where you are in life. Look at what it is that makes you happy and drives you. Look for the same thing with your husband. Try to find common ground. If there is love there, you will find that common ground.
4.Once you have found that common ground, try to find some way to use that to your advantage. If there is something that brings the two of you joy, try to find some way for the two of you to experience it together. Let it seem like a spontaneous thought and try to make it seem like it is his idea. Try and generate some excitement about it. Don't go over board with the excitement, though.
5.When you are doing the things that the both of you love, let him know how special you think he is and how much you appreciate him. Let him know that you miss what you used to have. Let him know how you feel. It is easier to have those feelings reciprocated when you are both having fun doing something you love. Don't be afraid to tell him, "I want my husband back." You may just find out he wants the same thing.
You have to know that it may not be possible to get back the relationship to the level it was when it was at it's peak. Just because "I want my husband back" doesn't mean that it is the best thing to get it back to the way that it was. You should believe, though, that what you saw as the high point of your relationship doesn't have to be the all time high point. The best in life is still to come if you are willing to do the work that you need to do. Tell yourself, "I want my husband back, but I want the relationship back stronger than ever" and then work to make it happen.