First of all, welcome to the forum, Ashley1987! Second of all, there's nothing wrong with being a "slut". We don't view that word in a derogatory or negative way here.
As for you and your husband...perhaps you can see what has created this change in him? Something must have occurred from then to now. If he is religious, it might also play a hand in viewing sex in the manner he does now versus then. For some people, they see marriage as being a time to "tighten up" where the marriage bed has to be kept pure. He might also be stressed out from work, have some family issues that are bothering him, or health issues. Other than this, are there other marital issues?
Sex within a marriage can often be dependent on all of the above variables as well as others. Once the marriage and sex is in a healthy and loving place, only then can an exploration into fetishes, fantasies, etc. be done in a healthy way that is good for the relationship. To try fantasies/fetishes/etc. under pressure, ultimatums, or as a last resort to fix a relationship is a recipe for disaster.
Make this about him and your marriage and go from there. If you can get him to open up to you on what may be bothering him, support him, communicate, and give him time...then perhaps it will open up a new chapter in the relationship that may lead to fulfilling those fantasies together. Best of luck and I hope you keep us updated!