Most Helpful Girl
Well, in this sort of situation I would go with your gut feeling. Basically if your intuition is telling you that it doesn't feel like something that you like and are down for then I would cut ties. It also depends on the type of relationship you are looking for. If you have something casual with her and you enjoy just keeping it casual and sexual then there's nothing wrong with seeing and being with other people as long as you are open and honest about it and both parties are okay with it.
Hope this helps clarify in some way :)
Most Helpful Guy
I'd put her in the friendzone or just walk away.
There's no need to get in a relationship with her since she doesn't appreciate/cherish the sex.
Like other user has said, it's like a normal thing for her and she's getting it easily without much efforts.