Walk up to a good looking black man on the street, and start flirting with him. Tell him what is on your mind, and if he can't help you personally, ask him to recommend a friend who can solve your problem.
If your boyfriend is planning to marry you, why not tell him you need lovers during your marriage - so he has no misunderstandings of his need to keep house when you go out on occasional dates. It easier to tell him the truth now so you can find out whether his love for you is "conditional on you sticking to the wedding vows", or whether he loves you SO MUCH that you can be naughty now and again and he will forgive you instantly.