I think it would be rich if your sis came only to go on about how great her love life is... and not being sensitive to your current situation. Has she been supportive at all since your initial call to her?

It might be worth laying cards on the table with her (amicably, not to start a fight). You most certainly don’t need to put on a happy face for her sake. I just hope she can be sensitive enough to be there for you and supportive.

I hope I am not being too forward here but it may even be necessary to set stricter boundaries with your sis... I mean you are suffering enough, don’t need someone else to poke the needle in - esp when you don’t have real-life/T support.