Have you ever...

Sounds like every friend I've ever had

Yeah its a normal reaction

Absolutely.

Yes, but then I realized that I was dealing with a shallow, uncaring, dysfunctional individual, and it was his problem, not mine.

Yes

Of course

Many times

Nope never happened to me. I have an excellent radar for using people.
The trick is to listen to your gut reaction. People no longer listen to their instincts in relationships, including friendships.

Yes :o I worried that I wasn't interesting enough

Yes. It stings a little. I knew it would happen; because people leave. I just hate the ghosting shite. But I understand to some extent - it's the easier, less messy and less vulnerable way out. They don't have to deal with your emotions (or face up to theirs perhaps?). It sucks. I'm sorry it happened.

A guy friend once told me f*ck off turned out he'd got a nutter gf who didn't like him talking to other women. The minute they argued he started contacting me again.