if you really were a bitch - then you wouldn't even be aware of it!
so you're most definitely not. agree with lou, you're desperately unhappy and the reason you are looking for these reassurances outside of your marriage is because you're not getting everything you need from H.
too much has happened maybe? you've distanced yourself from him emotionally for a long time and are now understandably finding it hard to let him back in. he could be the most perfect husband in the world from this point on. but is that really enough? do you need a clean break and a fresh start?
I say this because I know that when I was 100% happy with H I would never even glance at another man. I didn't need to. I had everything I needed right next to me. I think when you feel that way, you just know. And you know something is just not right