Unintentional emotional cheating

I'm looking for something a little specific, books where the MMC is a bit too close to a female friend or co-worker or ex and doesn't realise how it makes the FMC feel or dismisses it if he does.

Ideally no physical cheating and only HEA please :)

I came across this is {Pulled Away by Siena Sloane} and I loved it. Any suggestions?