My sincere love is an expression of emotion and attitude, which comes from a famous saying in ancient China culture. Among them, "my love" means "I love" and "sincerity" means "true". This sentence means that my love for you is sincere and firm. It emphasizes frank and sincere emotional expression, which means that the feelings for each other are sincere and true, without any hypocrisy and deception. This sentence is usually used to express deep and sincere love.