A relationship for the sake of it?

I'm in a relationship at the moment, have been for a couple of months, but I feel like he never ever asks me about anything. . We just spend time together mucking around or having sex. I feel like neither of us know all that much about eachother. I feel sometimes we are just together because we both like being in relationships. I tried to leave him because I thought he was just disinterested because he never really talks to me for that long and he begged me to stay. . Is this normal or weird? I'm not terribly emotionally attached to him or anything so I'm trying to look at this from an outside view. I just want to know if this is how 'normal' relationships start or not. Most of my previous relationships were not that healthy.