Thats a very long time with someone, kudos to you! Thats actually some very good advice to be open about your stutter. Back then when I did date I would try to hide it so hard. Whether it be saying one word answers or short sentences or substitute what I really wanted to say with an easier phrase. I remember dating someone who lived at a college dorm and every time we would enter I would have to tell them my name and they would have to say it for me. I would be so embarrassed. We were both 18 so I didnt fault them for when they decided to break up with me because at that age I wouldn't want to deal with someone who has this issue. But im happy you have a supportive partner its hard to find those nowadays.