Having read your comments, I wonder when it comes to myself, as well. In my case, I married civilly to a non-Catholic — and still am. I joined his church. But, after fifteen years am considering going back to the Catholic church. The marriage and confession both confuse me. The latter because it’s been fifteen years — at least — since my last confession. In that time I could have broken every commandment but not remember.
You your local parish and talk with Father.He can answer your questions.If you don’t know your parish freepmail me and I can look it up for you.
I can top you when it comes to the sacrament of confession. It was just over 15(closer to 16) years since I had last gone to confession. I finally did go, and I have to say that the priest was excited about having me come back. I too had broken just about every commandment. I guarantee you that your confession will not be as hard as you think!
As for your marriage, If you do come back, you can still get married in the Catholic church despite the fact that your significant other is not a Catholic. I don't know how it is dealt with if you did get married in a different church though? You should definitely contact a priest in a parish near you. I am sure that he would be more than happy to explain it all to you. God bless you and please, come on back!