I’ve been working silly hours recently so may just be low in patience but just want some opinions.
I’ve a friend. We’re both mid-40s. We went to the same school (not same year) but became friendly after we left. We lost touch for a while then bumped into one another about 4 years ago. Used to meet for coffee etc pre-Covid.
We’ve messaged one another once or twice or times a week over the past year or so, had conversations if that makes sense. Work and home life makes phone calls difficult so mostly message back and fore as I say.
The last few months they’ve developed a really annoying habit. We’ll be mid-conversation, back and fore, back and fore, maybe I’ll ask a general question. They’ll read it and not respond. For days. They’ll be all over FB of course, but not come back to our conversation. A week or so later I’ll send a message and they’re back to chatting as normal and then do it again.
I was angry at the weekend when it happened so pointed it out to them. Said I always initiate our chats and as most people would find someone turning around mid-conversation and walking away in any other circumstance, that’s how I felt about this.
It’s been almost a week, message was read within 10 mins of sending, posts on FB since. No response. AIBU to break the silence only to say FUCK YOU THEN?
How hard is it to type “sorry, lots going on. Speak soon?” It’s ignorant/twattish behaviour to do this, right? I’m working my bollocks off for 14 hours a day right now - they don’t work and yet I’m the one maintaining the friendship? 
Not used to these online relationships so don’t know if this behaviour passes for normal these days.