I'm hearing, married to a deaf man. We've been together just shy of 8 years altogether and will be married for 2.
It is a lot of give and take, as others have mentioned. A lot of patience. When we first started dating, I knew nothing about ASL and had never met a deaf person before. Over the past 8 years I took classes at Gallaudet, made a lot of deaf friends when we moved to DC, and I sign around the house and interpret when my family is around or if we are just out and about and he wants to know something someone says. My receptive skills in signing still aren't the best, but this is due to him having a habit of talking and not signing.
He, on the other hand, doesn't want to be so dependent on me understandably, so he does his phone calls through VP on the computer or at work. He also attends doctor visits without me unless it is for something important. When he does sign to me, he does it at a speed that I am comfortable with and will often help me out when we are in a large group and I get lost in the conversation.
I help him with hearing gatherings, he helps me with deaf. He makes sure I learn new signs, and he asks me for help on making sure things sound right in English.
We plan to start having kids in a few years and are unsure what the chances are of them being deaf, but we plan on having them sign however they come out.