Man's ego always hinders one's progression in
love; I am citing your passé and extremely cliché point four:
somebody else is able to give her happiness better than you
do.
I heard that excuse a thousand times and I am seriously interested
in knowing how are you going to gauge and decide if it was true in
the first place?
In introspection, isn't this claim a product of your inferior
complex rather than reflecting an actual truth? 
***
Since you are just ranting; I will just share my
two cents.
This is a choice
between security and freedom.
People like you opt for security - you are a best friend and
wouldn't want to do anything that would jeopardise your status quo.
In familiar wavelength, it's the same with an employee mindset -
earning a decent salary and already warming up a good seat in the
corporate hierarchy.
Many often talk about starting their own business - who actually
did?
Singaporeans often complained about the government, but ended up
dropping votes for the very party they hate.
These are everyday analogies that effectively describe people who
desire security much more than freedom.
And therefore asking that 'someone', who desire security, to move
away from certainty and to pursue something risky is often
justified with excuses like 'I think he can provide her better than
I do/I got a family to feed and I can't start business/I hate the
garmen, but I rather not take the risk by voting alternative
party/etc.'
And the fact is that there is always a mountain taller than
another. There's always someone else better than you do and someone
even better than the next guy. The concept of 'providing' is but
relative to our perception and mindset.
If I were to tell you that real love transforms people into
strength and if you are unable feel the strength to experience
metamorphosis and evolve into someone powerful, then perhaps, this
love is pretty much surreal. You cannot say that this quiet
affection for this lady is Love, other than plain admiration or
young infatuation.
In Love, the battle is always against yourself - not people outside
you. 
Cheers