All your negativity
contributed subconsciously to your self fulfilling prophesies -
your failure in this relationship is a mirror image of your basis
definition of love. I shall quote you the phrases that have
attached maliciously as part of your core belief:
The source of your
possessiveness was created from your perpetual effort of trashing
yourself down in negative light. If you reckon that you are
unlovable, no matter how glorious your relationship has the
potential to be, it will appear bleak; like peering through a pair
of sunglass, even if the landscape could steal your breath away
with its majestic stunning colours and lush details.
From the way I look at this, your psychological and emotional
structure appears more problematic than your relationship itself.
If you are unable to exhibit love for yourself and raise that self
esteem, your next relationship would just be the next prey to be
devoured by this insecurity once again.
Paradoxically, though you understand that 'you are digging your own
grave', you still persisted with your nonsense - signified a
terribly lack of wisdom.
I hope you understand that the downfall of this relationship is
largely because you are not emotionally and spiritually evolved -
strong hint of an alpha male dominance. Resolve that inner
afflictions caused by your developing years and enlighten those
blemishes from within. 
..but i'm really really hurt that even after i changed,
she didn't give me the love i've always wanted..she didn't stop
showing disinterest with me..she didn't show me love at all..but
she used to love me more than i did..
I will repeat again:
this is a self fulfilling prophesy. You reckoned that you will
always fail in relationship and so congrats: you achieved exactly what
your mind has envisioned. Never mind how great the
relationship was and never mind about she giving more previously -
because you thought that you are unlovable and doesn't deserve
genuine love, therefore you coerced subconsciously her to comply
likewise.
Individually, your condition is far from what Love needs of you
personally before you are ready for a relationship. It's not about
love - it's about you. If you can't even handle yourself, I doubt
you are in any position to extend this very love to someone else.
Cheers
