Like I said before: "The delusion runs deep on this thread"...
"an angel in my life" OMFG! You have a totally different concept of ANGEL my friend, sorry to say. What you're getting is an ANGLE!
"I can see other girls just not her friends" FFS! Really! I can only imagine the conversation between her and the other MPAs in their little rest/lunch/hangout room. Meanwhile she's probably laughing at you while she is telling her fav about the idiot she is controlling...
Both of you need to be cognizant of the fact you are paying these girls. They are providing a service/services, sexual and/or psychological.
If you are seeing them outside of the Spa or where they are providing service, maybe there is something approximating a relationship of some sort, tenuous at best I would suggest.
If you need or want to get the services of a sex worker you must remember - even though you are being physically intimate, YOU MUST NOT LET IT BECOME EMOTIONALLY INTIMATE. You will regret it at some point...