He said he couldn't sleep all night thinking about it and just had to tell me ugh.
This is so typical, it's all about him, he couldn't sleep, nothing of the hurt and pain he caused you...again typical cheater bullshit.
On a scale of be honest about owning up that he was on a date..1 out of 1000, pathetic.
Have a good cry, process the pain, vent to your friends, vent on here...get it out of your system. You sound like a good person, you've handled (and Mr Bell-end) yourself brilliantly.
You're out with friends at the weekend right? Make sure you still do this..you might end up a snotty crying mess at some pint, but you need your friends around you. Even if they just come round for an evening of Prosecco and a takeaway.
Hold your head up high, you've done nothing wrong, take the moral high ground, don't vent on social media, go No contact with him, block him on your phone, social media...
32 is still young, learn your lessons, fix your picker and find the guy thats out there for you.
Hugs
Fanny (That sounds so wrong)