...what they've done for us is more than enough, sometimes I feel that we don't even deserve it.
No, they didn't help us in the fighting part, because they didn't want to get directly involved, but if there's an Indo-China war, we may join because it will be beneficial to Pakistan (but that depends on the conditions of Pakistan at that time). Getting china to join the previous wars is like asking Pakistan to help out in the border tensions between India and China.
Allies are allies, slaves are slaves, masters are masters, etc, etc but the
allegance can be damned to hell. We've lost a lot more in the war and a few F-16s and the like can't pay for it- sure, if we won Afghanistan, it may have been worth it.
Right now Pak is in no condition to fight for or against anyone. That includes China, and that probably includes Kashmir (though I think they are capable of getting independence on their own if there is some 'arming' support
)