Ok TS, I saw your response in another thread where you stated
that you liked "underground" or "hidden" romance because it is more
exciting.
If that's the case, I can surmise that for your relationship
with A, you like the feeling of adventure. Likely this is a
short term thing, a rush of endorphins. More like embarking
on an adventure.
For B, likely it could be something more than just a simple
friendship. Whether it is love, only you know. But
definitely, it should last longer than you relationship with A
(which it did).
There, did I answer your question? 
