Once we understand that people have different ways of expressing their love and that other love languages may be less pronounced, this can massively improve our love life. Through this knowledge we become gain a better comprehension of the different languages of love. This also helps us better understand better why our partner's different expressions may differ from our own.
When we receive news of successes and achievements from other people or from our loved ones, it is sometimes deeper feelings that influence our reaction and lead us to not share in the happiness. Our own insecurities and fears can move the success of the people closest to us and our positive reaction to it into the background. Jealousy, as well as feelings of unjust treatment, can play an equally important role.