Cecilia, you sound like I did in early recovery dealing with feelings. I felt sure I wouldn't be able to manage the negative feelings I had to deal with when I stopped drinking. I knew it was going to be really hard and it was, but I learned that they are only feelings. They don't dictate who you are. You can feel them, acknowledge them and let them go.
Whether or not you find another relationship soon, you will have a much better life when you stop drinking.