In regards to your statement that the Lifestyle may not be right for you: maybe, maybe not. But if I recall correctly from previous posts this is your first D/s relationship? I wouldn't throw in the proverbial towel quite yet on BDSM, one relationship having troubles does not a pattern make.

As for the current relationship: perhaps it would be, however, a good idea to examine the D/s aspect of the relationship and see if it is something that is helping or harming it right now as I also know there are other things going on in your life that need attention. This may just be a case of having too much on your plate all at once at not being able to handle it all. Step back, pick one issue and work on it. Then tackle the next one. Don't try to take it on all at once. If through this process you find that your Sir is not the one for you, if there are issues neither of you will or can compromise on, then at least you will have rooted out those issues specifically instead of just scrapping everything about the relationship, BDSM included.

Best of luck.