She sounds like she has a very busy life, I can understand why she can't text or meet up more often. You might not be her first priority (she has kids) but that does not mean you aren't important.

Her expectations of friendship do sound a lower intensity/frequency than yours.

When your T says to be around friends once a week they may mean a varied group of friends so you have social contact with different people - I think that is good advice if you can manage that.