Do you want more physically from her?

There's nothing wrong with the relationship that you have together, if you are both happy. Having sex is a choice, and like everything else in a relationship there is compromise involved. If you don't want to have more physical intimacy than you are getting, then it's all good!

If you are wanting more physically from a relationship.... then there is nothing wrong with just having Crissy as a very established friend. You can remain close friends with her and develop other relationships; sort of like what you are doing. But if you want a meaningful, sexual, relationship then you will likely have to severe the limited physical intimacy that you have with Crissy.

I'm not sure if any of this is really helpful or not, because I'm not sure if you're wanting to develop more physical attraction/intimacy with Crissy or not.