Boyfriend advice

[Isefet]

Hi people!
I just need advice. I dated a man that I loved and still love but we broke up because of an addiction he didn't want to abandon.
As a result, I dated a man who told me on our third date that he's an escort.
We still dated but broke up when he went to college and when he made me realise that I still loved my first boyfriend.
I tried to patch things up with my first boyfriend (who gave up his addiction) but learned that he had sex with my ex escort boyfriend...
He told me that it just was sex (even though he didn't pay so we can't really call it a job escort) and both of them knew that we were linked and didn't like each other when I was dating the escort boyfriend.

Should I get back with my first boyfriend, even though he had sex with my ex boyfriend while we were talking about getting back together?

Thanks guys, kisses