Love is wanting another person to be happy. It is unconditional. Most of what we call love is meeting our own needs and is a form of self love. Love is not just a personal emotional experience. Generally, we appreciate somone when they make us feel good. However, this is not loving them, we're loving their satisfaction of our needs.
Making someone happy should be done with discernment. Making a child happy by letting them eat a whole quart of ice cream may make them happy but this is not a good way to make them healthy. Short term happiness can have consequences that are negative in the long run. We also have to remember is that we cannot make anyone happy, but what we can do is wish happiness and treat people with kindness, patience, and caring.