British cuck male looking for LT cuckold relationship

Well-educated, easy-going and slightly alternative (though not off the radar!) white male looking for a long-term cuckold relationship.
In my mid-40s now and aware that monogamous vanilla relationships don't it the mark for me. It's not that I want numerous sexual partners (I don't - I only want one for the long-term) it's just that I love white women who like black men. Cannot explain it but it's real and I want such a lady as my partner.
Apart from this I want what most people want from a relationship such as love, friendship, intimacy and sharing of each others' goals, desires and selves.