I've been on this Earth 50 years, and am only now learning the difference between true friends who have my back and will be there for me, and... parasites. It's painful to come to the understanding that someone you thought was a true friend was in reality, just a parasite, someone living off of, and using you. As long as you were of use to them, they were your best bud, once you were of no use to them, they are no where to be found.... Sigh... But, looking at it in a positive light, it's like separating the wheat from the chaff. Far better to have a few close, true friends, than a bunch of "hanger on'ers".
You handled it well!
..Mike