Am I being unreasonable to think that trying to develop a separate friendship with the sibling of a good friend is a bit off?
Over the past year I have casually introduced a friend, who I have known for a few years, to my sister. This has come about by inviting said friend round for coffee a couple of times when my sister has also popped over. Now, I have no problem with my friends being on friendly terms with my siblings, quite naturally I am on friendly terms with some of their friends too, but there is no question of where any of their loyalties lie.
However, with this particular friend, we are now at a point where I can’t make arrangements with her, such as a film or meal, without her wanting my sister to join us (my sister always declines as she has her own busy social life and to be honest finds it a bit odd.) She has swapped numbers with my sister and has even tried to make plans with her directly, without inviting me! She generally leaves me feeling like I am just a stepping stone to a friendship with my sister.
I have tried to counter this by only inviting friend when my sister is not free and just telling my friend I am busy if I have already made plans with my sister, but then she acts disappointed and spends the time asking after my sister and her life?!?
I really want to remove myself from the friendship as it is leaving me feeling upset and resentful, but circumstances make it very difficult to do so cleanly. I usually like to be straight up and tell a friend if I am upset, but to even voice this makes me feel like I am back at school. To be honest, I don’t think it can be resolved.
So am I being unreasonable to be hurt by this, or am I being too sensitive? Maybe I have blown it out of all proportion, I just can't tell anymore. What would you do in my shoes?
Thanks x