If you want to be happy then breaking to rules of give and take will help is some situations. Yet you are not expecting any returns. When you apply it with love then just give love and let go if its not for you. Feel no worries and be happy.
Sometimes it is not enough but your contented to it! and there are painful situation and yet you can be happy.
Sometimes we need to let time past, take a deep breath and pray. This is what I am doing in times like this. If you need love, then be true to yourself and ask it from God. He can gave you the love that no others in this world can give you for being hones and true to Him.