likea - At the end of the day we are just random people on the net who will never be able to witness the things you describe and so we can only judge from what is written here. Meaning we might judge wrong.
But I can't help being reminded by a situation my gf described from when she was younger. My gf had never been with a woman. A female friend she was close to kept telling her much she liked my gf, how special she was and would do odd things like ask to sleep in her room because she was scared of sleeping alone - they lived in a shared house - to which my gf agreed or randomly buy her really nice gifts. She was very tactile and huggy with my gf as well.
At the time my gf thought this other woman was lovely, but slightly needy and was just desperate for a close friend. Now she looks back and thinks duurrhh! how could I have missed her signals that she was obviously interested.
I think what can seem obvious to you can not even occur to someone else, because as someone else said upthread, most women don't expect to get these signals from other women. The fact that your WIQ is older may complicate things as she may think any of your signlas are becuase you are looking for a mother figure and therefore you are being slightly more effusive than would be normal for a friend.
It is hard as I don't actually know you. But you do sound over the net as if you are being tormented about this and maybe it would just be better knowing one way or the other. So maybe a letter would be best so you finally know. Yes it is a risk of course, but maybe one worth taking?