i understand what you are going through.
i married vanilla only to later discover my intense interest in the bdsm lifestyle. so i conveyed my interest to my husband and well....it's just flat out not his thing. we tried. he tried for me. but well you can't force someone to be gay anymore than you can force them to enjoy spanking someone else.
but it's like the above gentlemen said.....absolutely any sucessful relationship is about communication and honesty. honesty is also very important.
you need to lay it all out there. but you also need to understand and accept that.....you can't change a person. not their tastes, their opinions, their ambitious, or their fetishes.
me and my husband are still together, but it's been difficult dealing with our different interests involving this lifestyle. but we are honest with each other and open.
it takes alot of work to make any relationship work. just sit down....talk with him.
if you would like to talk to me, a bit more about maybe, how to introduce him more to the lifestyle, i would more than happy to help. just pm me.
otherwise, the best of luck.