Yes we all want to be wanted.  Having them call YOU rather than you having to call them would be nicer.  I get that.  I also want connection so I call the people I want to be in my life rather than sitting by the phone.

If you don’t ask for what you want then you probably won’t get it.  It sounds like this is a lot more than staying in touch.  It is your relationship with your parents and self esteem.

Keep communicating especially the way your therapist recommended.  Make your request and communication specific, e.g. I would want a call rather than a text on the 3rd Sunday of every month.  (You may even want to text them a reminder on that day or day before).

Mark