@Curtis, I feel for you mate, it’s a lot to go through.
As others have said, you really shouldn’t continue beating yourself up about what happened. It was a small mistake, with no malice aforethought. You received a cruel lesson from that but you can’t continue with what if’s.
You have to focus on the good things achieved in the relationship and if you made it possible to be enjoyable, then you can do so again with someone different.
It’s time to look after yourself and leave the trepidation of new relationships to one side for the time being.
Rebuild the love for yourself and realise your worth. Once you get your head back in a good place, then dip your toe back in the water, without expecting too much too quickly.
Things will turn around, I’m sure, just be kind to yourself. You are a good person, believe that and know that people are wishing you well and are here for you, should you need them.
All the best, mate.