In my opinion, that's not love, it's more stupidity (sorry for the word) how can she still love this jerk who is mean enough to cover her face
with pillow during sex, fools around with other women for god knows how many and gave her STD's.
If she is still in love with this guy and feels she can still love him despite all that, then i'm afraid she is a masochist....
And her second reason that he might change? That's a wishful thinking and a complete illusion.....
But maybe he will change, once she start making things right by standing up to him,
walk away from the jerk and finally refuse to be a victim for a change....