It's important to realize if you really truly love someone, you wouldn't want to hurt them, or do anything they don't want to do. If he's constantly pressuring you to have sex with him and he's not listening to you when you say no, that's not okay. If he knows its something you don't want, he should stop. And you should never feel miserable and as if you don't want to live in a relationship. You should feel happy, free, loved. I don't think he's the right person for you. It doesn't seem like he understands you or wants to love you. It sounds like he just wants to have sex with you especially since you guys did it so early in the relationship- it doesn't seem like he spent the time to try to get to know you and care for you and be committed to you. I would definitely walk away. It will hurt and it will be hard, and you will cry and that is all okay. But it will be easier now than much later,if you were deeper into the relationship