ask her back,
are you finding a reason or an excuse to breakup?
to me both the answers to the questions seem linked.
every relations strat of with crush, then go on to love, finally
till you cant do without the person. there is a saying,
"you marry some1 whom you cannot live without, not some1 whom you
can live with."
so isn't getting used to her part of the procced to whom you cannot
live without?
if you have been neglecting her,taking her for granted then its
your own fault. just apologise, be a man, except your mistake, ask
to patch, if she don wan, just remain as friends and move on in
life.