Hi Richard,
What is love? Other than 孝悌忠恕, at your age, you might have other definitions. How about this one?
"Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres." 1 Corinthians 13:4
「愛是恆久忍耐，又有恩慈；愛是不嫉妒，愛是不自誇，不張狂，不做害羞的事，不求自己的益處，不輕易發怒，不計算人的惡，不喜歡不義，只喜歡真理；凡事包容，凡事相信，凡事盼望，凡事忍耐。」哥林多前書 十三章四節
I came across this piece of the Bible when I was in primary school. It strengthens my confidence in every situation of life.
With love, Patrick