Firstly, stop saying "western countries". People express their love the same all over the world. Some things work. Some don't. Ask a friend who has been successful with girls to tell you this stuff. You won't get much information here.

All over the world men say " I love you" to women. Pick a quiet romantic place. If the woman does not say " I love you too", then you will have to accept this and just remain friends.

Yahoo answers and google might help you mate. We are here to study and learn languages. Good luck on finding the answer.