i really, REALLY envy people who share the hobby with each other.
i know a few people who are into painting and gaming and who introduced their partners into the matter of little plastic figures for $20.
some paint together, give advice to each other and paint minis as presents.
a few months (or years) ago when i stopped painting to become a \"pro\" in warcraft 3 i got to know a few boys with theirs girls almost playing better than tehselfs.
damn what envy i felt

truth is in my \"gf phases\" i mostly stop painting/gaming for a few month so i never had an argument about spending too much time on the hobby but, of course, i basically understand the problem of spending not enought with your partner.
im not an expert and i dont know what is better, both beeing involved in the hobby or only one but you stop painting would be a complete waste of skill

but keep in mind, if the relationship wouldnt break because of \"your minis\" it might as well be any other reason like spening too much time with your friends, acting \"strange\", the \"doesnt work that way\" or the typical reasons
if her mind is made up the \"why\" doenst really matter anymore.
keep ya head up and paitn in pride!