DP and I had a big drunken argument three weeks ago and ended up breaking up in the moment. It was stupid and totally out of character and by the afternoon it was all sorted.
I was on his phone in front of him today and came across his ex in his recent messages, and another woman who is a female friend of his.
He admitted he had woke up after our break up and wanted some "cheap easy sec" and validation as he was devastated and messaged this ex and female friend for sex.
He has previously assured me this female friend was nothing but a friend and he wasn't attracted to her.
His ex he claims isn't his ex, but they were exclusively sleeping together/seeing each other for a few months with feelings involved.
He says he hasn't told me as he put it off as he was too nervous and never got round to doing it.
AIBU to be upset?