@ Thucy
I understand perfectly. You'd be surprised how many people venture down that avenue of thought at some time in their lives. The trouble is that it is painfully flawed.
What you have done is set off with the best of intentions. All men are equal, the inequality in hypocrisy in the world is disgusting, if everyone did their bit the world could be a paradise etc etc etc. Your conclusion is that if you dedicate your life to making the world a better place (and yes, I am aware that you're including allowances for your personal R&R in this) it will do some good directly and hopefully inspire a few others to join in. All lovely thoughts, they really are.
It ain't gonna work.
Problem number one is that you don't love humanity like your neighbour. You may think you do (ok... that's not fair... lets say at least that you think you should do), but you don't and you never will. Lets say there was a disaster in the place where you live. Some sort of flood, maybe, that is a serious threat to the people who are your neighbours in every sense of the word. Concepts such as your own personal rest and relaxation would go out the window, and your every effort would be centred on putting things right untuil either it is done or you are exhausted. That is what the love in love thy neighbour is all about. A stubborn refusal to back down into you know full well that things are as they should be. You will never feel this for humanity as a whole, and you should never try. If you did you would go insane.
The second problem, and I'm going to be harsh here, is that you have given yourself a get out claus. Be setting yourself standards that are impossible to achieve you have essentially paved the way for justified failure. Setting your morale standards so high they are impossible to achieve is what is truly repugnant, because there is no motivition to stick to them. You know you will fail, so you tell yourself their is no shame in failure, and judging whether you have actually achieved anything is damned near impossible. I challenge you to set yourself some difficult but achievable morale standards, and then to stick to them. To do so is ultimately far harder and more meaningful than what you have currently.
Out of interest, with the whole world as your neighbour how do you judge who to help? Which of your neighbours is worthy of your time and aid? Who do you intend to leave to die and who will you try and save?
Give yourself a sensible definition of neighbour and the choice is easy. You help those in need around you. The elderly who live alone, perhaps, or Mr Patel down the road whose family has been caught up in the latest earthquake in Pakistan and needs all the help he can get to do something about it.
If the world is your neighbour then, love them or not, you have to let them down. Every day you must chose which of the desperate and dying you will ignore. No matter whose lives you make better, countless others you will abandon to their fate. That is not good for the soul and over time it will destroy the person you are trying to be, and that really would be a tragedy.