I was in a LTR with a guy for several years, and, though he was very skilled in the bedroom, he never really understood my need for sex that wasn't routine and formulaic, nor did he know how to satisfy my desires to be dominated.

Fast-forward to now: I am in a FWB sort of relationship with a guy who is a natural born dom, and I can't get enough. Things have been mild, so far--tying me up during sex, spanking, and occasional commands; he's never made me call him master or ask for permission for anything. We haven't formally discussed this as being a master/slave type relationship, but I'm just so into him telling me what to do and controlling me. He has such power over me, yet he's never once abused it. All the things I craved for years, I'm finally getting.

I want this to go further, but I'm not sure it's my place as sub to initiate the conversation. I'm not sure if he'd even want to take it further--he's a very nice guy, and sometimes, it seems like he feels like he's an asshole or something for wanting to dominate me, even though I enjoy it. I'm also concerned about how the FWB situation fits into this; it's been going on for quite some time now, and we are both content to keep things commitment-free. I may want a master, but I have no desire for a "boyfriend" right now.

Any advice?