it sounds like you should concentrate on figuring out your feelings for your husband, separate from this whole ex thing. you said you're not sure you're in love with him, well, are you or not? Take some time to think and figure out what would truly make you happy and if your husband isn't it, then do some reassessing. Better to know than to live the rest of your life content. Content is not enough. You need to be happy. But don't go leaving your husband for someone else. if you do decide to leave him, it needs to be for the right reason--that you're not in love with him. otherwise, if things didn't work out with the ex then you'd be regretting leaving your husband, only you won't regret it if it's truly the best decision for you, regardless of what other man happens to be in your life. Just my two cents.