I game from on average from 10PM to 3AM five days a week. So, that's about 100 hours a month. I also have a wife and kid whom I spend all of my other waking hours with (when she is not at work, I'm a stay at home dad). We hike together, we play board games, go to the zoo, watch movies, TV... I could go on. What I'm saying is, while I do play 50hours less than what you said, it's still a lot, and I don't think I have mental health issues. I'm a bit of a night owl (always have been), but I'm a happy dad and husband in a happy family. You can game (a lot) without having it affect your family life, but it may affect your sleep. I just nap when the little one naps.

As for OP, I'm going to mirror what everyone else is saying and say that you need to talk to your husband and really make him understand how this is hurting you. Mention how it mirrors the way you two started out, which is especially sucky because those are such special memories for you. This does seem like emotional cheating even if he is completely oblivious to it. And definitely have some quality adventures outside of the house together as well. I think you two need to make some good memories together.