That is why you have to find ways to bring the sparks back. It is possible. Anyone new will be exciting because they are well, new...but you may be in the same boat with him later down the rode as well. In my opinion, if you really want to break up, go for it because it would be unfair for your boyfriend if your heart's not really in it. However, you must consider the fact that once/if you let him go, chances are you might lose something really great. If you two feel there is no chemistry or if you feel he is not right for you, then perhaps it would be best to end things. However, if you do choose to break up, I think you should wait awhile before you start a relationship with another guy. I hope the best for you! Good luck!