In essence, please your Companion of choice by selecting dialogue options and actions that he or she can agree with, and give gifts that they love. A Companion's Affection rating shifts according to how closely you pander to their interests through choice dialogue and how you curry their favor by bestowing them their favorite gifts. Add to the fact that not all Companions are open to the idea of love, and what you have is a crude dating simulator that offers side benefits of having a high Affection rating and a meaningful relationship, to boot.
