What tradition puts love at the forefront of the practice?

I come from a Theravada background because I like how seriously they (forest tradition) take the Vinaya, and their pragmatic approach to the teachings. But in my opinion Theravada doesn't understand love. Many suttas speak of the benefits of ethics as it pertains to concentration. Other suttas speak of "looking after others to look after yourself". Other suttas speak of the kammic benefits of making merit. The logic is simple: do good and you will be rewarded. But that is not caring for another, it is not metta or love or what have you. It is child logic, like how you might motivate a child to clean their room or look after their sibling. Truly caring for another is looking after their welfare, for the sake of their welfare. Your motivation is seeing their benefit. Your joy is in seeing their benefit. This relates to another point. Love is a taboo word. But love doesn't just mean erotic or overly attached love. Love can be of a universal kind. Love can mean to expand your circle of concern for others. Truly and deeply you feel sympathetic joy, compassion, and kindness for them. What motivates love is not self gain, my own narrow sense of merit or pride or a negative sense of moral shame. What motivates love is caring about another being. Personally, I think love is the truth at the heart of the way. Otherwise, why did the Buddha teach? Why not live in bliss and ignore the rest of the world? But he didn't do that, and he didn't do it to make merit. He did it 100% for the sake of the benefit of sentient beings, motivated by their benefit. At least, I hope so. Is there a tradition in which this selfless conception of love is found and celebrated?