Mutamar, KhozinPutra, SupriadiDeswita, LeliMuhammad, Imran2016-04-222016-04-222016-04-222085-2630wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/8254This article discusses about application of linear quadratic regulator in linear model of Love and Happiness with Affair. This paper focus on model with condition that make its unstable. Optimal control is used to control Romeo as treatment in order Romeo to release his affair. Simulation is given to illustrate design procedure and the result of treatment using LQRenLinear model love and happiness with affairlinear quadratic regulatoroptimal controlUR-Scientific Work Lecturer