Loving someone doesn't really means the person has to love you
back. It is called "one-sided", but I prefer calling "unconditional
love". Yes I may not be as happy as I could be if she reciprocate,
but I am happy simply knowing she is happy, whether she is with me
or not.
If marrying her means a whole lot of hell from her family side
means I would not be happy. But I marry her, not her family. Her
family may give hell to me but I am prepared for it. If I am not
prepared for this, I shldn't have gotten married in the 1st place,
right?
Sometime marrying someone, there are sacrifices to be made. And yes
many things I can do when I am single would have to be put aside.
But dis only comes into account I have acknowledged what I has to
sacrifice if I go into the vows of matrimony with her.
AND it will be better if we both understand each other well before
the discussion of marriage comes in. Its when we know each other's
strengths and weaknesses, likes and dislikes, habits, hobbies,
quirks, behaviours, lifestyle, beliefs, family, friends, etc, etc,
then we decide if we are able to bring our relationship to another
level: which is marriage and living together and many other
things.
That is why I prefer not to jump into the "love wagon" without
knowing the person well. What if I jumped in and found out she has
many things I found it hard to live with? What if she found out I
have things she cannot agree upon? In the end there are so many
things we cannot agree on, we have to break up? Sorry, I rather not
go into a relationship than going into one and end up breaking her
heart and mine.
I know I cannot answer your question in red but I try my best to
say it within my limited capabilities.
Loving someone is a hard thing to do. Can
you love the people whom you hated? Can you love the people who are
so good at backstabbing or havoc wrecking? Can you love people for
who they are and what they can be capable of as a person in the
future? Can you love someone knowing you do not get anything much
for what you give? I can't do all those, but I am trying my best
though. 
I know all these seems like "wah" or "ooooh", and it may be like I
am talking big. Basically I am talking BIG but I am trying my best
to be capable of doing it unconditionally, that is why you see why
I put my MSN nick as that.