As a dominant that has had a couple of long distance internet D/S relationships, sometimes it can be hard and the distance can create a lot of frustration and sometimes it is too much for one or both of the parties. Is this the first time that he has been in a LDR?
It’s also important that things Read more… are kept fresh and interesting when in a LDR and some Doms may not have the imagination for it.
I think you may have to just ask him outright about what he wants and where he sees things going and if it’s not what you want, then unfortunately you need to move on.
I wish you the best

I agree that communication is key. Is there a reason that he doesn’t want/ hasn’t had sex in that time? I think you will need to focus on getting the sex life at least starting to build back up before introducing the more kink side. It may well take time.
Another option is to discuss opening the Read more… relationship to satisfy your sexual desires. This would not be considered cheating as it would be consensual. Anyone reading this can tell that you care and love him very much but you need to be happy in the relationship as well.

I think, as some people have already mentioned, it comes down to the individual relationship. From my understanding it is mostly a one Dom and one sub relationship but it can be expanded depending on the skill set and feelings of both people involved

I would say have a conversation with him. Be subtle to begin with and try to lead him into the subject and see what he says. Some people may tie you up but not enjoy being dominant at all.
I’m in a similar situation however my dominant side has come out while in a relationship and I know that my Read more… partner won’t fulfil that side.
If the conversation doesn’t go well, then maybe you need to think about other options such as having a part time Dom with little to no emotions to fulfil the physical side of dominance and have your boyfriend as the emotions for day to day life