Love is a gamble and if you expect something in return, that is
probably not love - More like a deal between two. If you are so
calulative about who is giving and receiving more - I rather you
take the time to do something more practical. Sure it is may
disappointing when you are being 'used' by another person, but hey,
who else can you blame apart from yourself? Being 'used' and
'giving' in relation is two different thing. If you are 'used' -
you are being cheated from your action and why does it happen?
Because YOU allow it to happen. Giving in a relation is an
involunteering action that does not take records of what have you
done, etc. Since it does not take record - when you are giving - by
right and logic, you should not even feel this way at all, unless
deep inside you wanted something. 
Instead of pondering over this issue that doesn't do you any good,
think about this - don't just like someone blindly and being lead
by the nose to eventually find out she is conning your feelings.
Sure love is blind - but play emotionally and rationally smart
moves to find out whether is she serious, or making 'used' of you.
Cheers
