Thank you for sharing. I read your whole post too.
I'm sorry your grandmother is so unaccepting. That must be very painful. The older generations are often still rigid about sexuality.
It's frustrating when you want to spend time with someone and they are "connected at the hip" with someone else. I recently met a woman I would like to spend some time hanging out with, but her boyfriend is always there. And they don't invite anyone to hang out with the two of them. They are always alone together in her apartment.
Have you asked your friend if the two of you could have some time together without the girlfriend? Tell her you miss spending that kind of time together. Maybe she will respond.
--Ceara