Ahead of you were Jemima…and before her…was Sita White! 
Neither of whom are in his life right now. Sure…he’s currently womanless…and that paves a clean path for you.
HOWEVER…to manage stealing a hottie like, B, from his fashion model of a girlfriend is not only quite a feat…it’s also SCANDALOUS..
And…scandal…daaahling…SELLS LIKE CRAZY!!! Sure, it has a tawdry touch to it…but let’s face it…everyone would want to know about who the “other woman” was that managed to whisk B away from under his girl’s nose.
Way ahead of you on this one