Get rid of your ladyfriend, if she tries to inhibit you, no ones friendship or love is worth it if they try to boss you around on their whims. Changes are though, that she is just more intelligent than both of us and quite right in not letting you enlist.
About army, well I can't speak for much of the known world, since we Finns are not engaged in wartime suff with anyone right now. Still, enlisting even though you'd have much more to offer to the world is just wrong. Volunteering to beat teh **** out of foreign people should always be the last option. I question ones sanity, if he wades gleefully to war.