I agree 100% with your last line ;). OK, my statement "trying to make someone else happy, will never ever fail to make you happy", perhaps needs a footnote such

I agree 100% with your last line ;). OK, my statement "trying to make someone else happy, will never ever fail to make you happy", perhaps needs a footnote such as "in moderation, obviously. does not include sacrificing your entire life for someone determined to remain unhappy or suffering from severe depression". Then again, its surprising even someone with depression who doesn't give a lot back, you can still go around thinking "well I tried" and your friends respect you, perhaps they emulate you. Good begets good, and all that. That's the idea of the pay it forward movement etc