Sometimes it is harder for the person who actually makes the final break. You have the final burden of ending the relationship, which means any doubts or regrets weigh more heavily on you. From your husband’s perspective he probably rationalizes and moves on with, “well she left me” in his mind. I am going to assume you were not feeling so awful until he acquired this new friend. That is very common. Learning your exspouse has moved on can be very traumatic. It happened to me with an exboyfriend, we mutually broke up, he had been pretty crappy to me for a lot of our relationship, and I was sort of ok after the break up. Then I found a few weeks later he had a girlfriend and I was a total mess. Dry heaves every morning, I would shake for no reason, cry, couldn’t eat, it was emotionally and physically horrible. I was pretty bad for over 4 months, I had to take xanax regularly for about 6 weeks to be able to function. For many months I could not even think of any shitty thing my x had done, I just wanted him back, not only because I was sure I had made a mistake breaking up with him, but also because I wanted the pain to end.
I spoke to 3 different people who had been though divorces as young women, and all of them said the same thing, it was horrible for them, even if they wanted the divorce, and it took them almost 6 months to get back to a semi-normal level of functioning. They were all gald they had divorced, they all got divorced because it was the right thing to do, and breaking up with my x was right also.
I know that was a long response, my goal in telling you all of this is to let you know that it is very common to feel as you do, even when the break up is the right reason. You are grieving having been with someone for many years. Even people who are abused and kept against their will sometimes miss their captures – stockholm syndrome. The mind does strange things. Try to indulge yourself a little in things you like to do, if you feel able to enjoy yourself, Let others help you, many people knw the pain you are going through, talk to them. People who have no idea of the type of loss you have been through may not be very good at making you feel better or undertood, and they may have little patience for you being upset; avoid thos people they are not helping. My girlfriends and sister were unbelievable when I went through my hard time. They came over to visit, listened to me when I was upset, tolerated me more then I ever would have expected. I know you will feel better soon, everyone I know gets better.
Also, you mentioend you might have left your husband because you were distraught by your grief from your father dying, I thnk don’t forget that you are grieving right now two major changes, your father dying and your marriage ending. Try to be patient, and accept you might be upset for a while. I have a friend who was ok for 2 month after her mother died, and then boom she fell apart, kept going from doctor to doctor because some of it manifested physically, really bad. She lost almost 30 pounds in a month, and she was only about 20 pounds overweight at the time, she looked awful. Eventually she got better too, took about 7 months.