[Panelfantastic]

Money. It kills more relationships than anything.
My wife knows how important my projects are, if the money is there, she encourages me to get what I want, if I can get free time, she encourages me to get to the shop and unwind... BUT, the hobby is not something to have disagreements over. It is a bad sign of the stabilty in a relationship if there is resentment about your hobby.
It's waaay complex of an issue. There are a million questions to ask yourself,
You have got to be honest and realistic about your answers to get the one answer you want.
Do you blow too much money on the hobby? (late on rent, kids need clothes, utilities been off three times this year?)
Do you spend more time in the garage than with her? (somebody else will be glad to step up and handle your lonely gf)
Is she just plain old jealous that you have any other interest than sitting on the couch and staring into each others eyes?
You need to have a serious talk with yourself, man up and decide if you are really being fair about things.
If you convince yourself that you are perfect, then you need to help her with her luggage.