I had an affair
Why would you have an affair?
I know that's how it's supposed to be. But I have a feeling my husband does not care about our marriage anymore.
Still, you should try and work it out with your husband first or get a divorce before you seek a new love interest. Now you have a label of cheating on your husband and that is a terrible look to others. It also looks bad to the court system if you end up having to go to court over a financial dispute.
We haven't been having sex anyway.
That's still not a good reason to go and have an affair. You should always divorce your partner before you go sleeping with someone else.