There is a lot of give and take in every long term relationship, married or not. What's most important is your kid, a close second should be both you and your spouse...yes, that's right...both of you on the same level with the same value in the relationship, regardless of who makes more money or has more time to give.
Being the non-diver in my relationship, I can understand your husbands point of view, but I think there is a way for both of you to be happy about your new passion as long as there is compromise from both sides.
I'm not sure whether I will ever be a diver, mostly because my cousin died earlier last year from a pulmonary embolism which circumstances are still uncertain of the cause. However, a large portion of my family has assumed her death was diving related and due to an inherited blood clotting disorder. Whether I will ever find out for sure is unlikely, but having to hide or defend a hobby kind of takes all the fun out of it.
Usually, my boyfriend is pretty accepting of the pressure from my family, even though he consitently implies (sometimes not so subtly
) that sharing a hobby would be good for our relationship.
While I sometimes fear becoming a diving widow, he takes my point of view into consideration and it really hasn't caused any major issues thus far. Besides, I wouldn't want him to give up diving because part of makes him so attractive to me is that he gets so passionate about the things he becomes interested in...now as long as he stays as passionate about our relationship as about diving...we are in good shape
Bottom line, there has to be some compromising, but if you start sacrificing the things that make you YOU, your relationship will suffer...now how much is THAT worth$$$?