This is sooo interesting as I have a friendship with a lovely girl who has just moved into a house costing , ahem, £3m.
She has NEVER rubbed my nose in it, or boasted, infact she can't believe she lives there. BUT I always feel there is a 'barrier' between us, but it comes from me feeling inadequate rather than her making me feel like that.
Me and dh don't go out for dinner with them, their wealthy friends do. We don't go away with them, their wealthy friends do.
I feel I am like a 'court jester' who is called on to make her happy and laugh. But I stress, that ALL comes from me, and not her. My whole house could fit in her hall.