<human>: Can you condense the text into three sentences or less?

We just bumped into eachother one day at a meetup-type group, and slowly a friendly bond increased. 

It was just like any sort of friendship for a while, until one day she started over-sharing about her kids, one of them my ex-bud. 

I enjoyed being trusted at the time, but now I realize how strange it has made me feel inside. I can't handle it. 

She has told me stuff about my ex-friend that I really didn't want to know, that the ex-friend would NEVER want me to know, and generally this has altered the way I act and feel around that circle of people. 

I have found out the hard way that it is a burden to hold secrets inside that are about a person, while being forced to pretend around that very person that you do not know their secrets. (dunno if that makes sense)

Also I figured, 'If this woman's willing to tell me the intimate secrets of her own kids, how can I know she isn't sharing my 'secret' details since I'm not even her kid?'

I don't want such a complicated friendship in my life, but she IS generally very nice, warm and a good listener — oversharing aside. Does this mean that I owe her a face-to-face ending, or is an email acceptable? Or maybe just nothing?
<bot>: a very strange friendship with an ex-friend's mom, but does this warrant my goodbye being in email-form?