I've recently been feeling some distance between SIL & I. We were by no means best friends, but she's made it clear she doesn't like our mutual group of friends (friends through our partners) and has removed herself from the group, stating she felt left out.
As an olive branch, I invited her to a meal to try and mend bridges. She didn't confirm immediately, saying she would let me know.
The day/time of the meal, she messaged me to say she wouldn't make it (no excuse given).
The meal was rearranged a few days prior, but as I had a feeling she had no intentions of coming I wanted to see when she eventually would get back to me.
I don't know what I should do - do I keep trying to integrate her, or leave her to do her own thing?