I feel like my dp is cheating

[Germanicus]

and I don’t know why.

Long story short, dp and I have been together 3 years and were very much in love. Going through a rough patch that started around 6 months ago.

It hit me right out of the blue. We were on holiday in Venice and told me he had chlamydia, and so I needed to get tested. Turns out after a month of further probing, he had slept with someone once whilst very very drunk and annoyed at me.

I took me around another month to decide to forgive him and to rebuild things. Things are getting better. He begged me and promised me the world for me to forgive.

Tonight I spoke to him on the phone, and I just have a terrible feeling. I have zero proof, but I just feel something has happened.

Am I crazy?

OP - you just need one new Jewish, not an army of them....
Surely another one exists where you are...

Or, you need to stop thinking and accept that this one is it. The way he is. And ignore occasional cheating.

The biggest red flag for me is how he handled his negative emotions by cheating on you. What will happen when you are sleep deprived after dc will he punish you by cheating?

Men who can't express their negative emotions are dangerous to be around, they often appear perfect and charming.

Around 2 years is when the mask skips so right on schedule he has shown you who he is.

Settling is never ever a good idea, you will regret it.

So he:
*Announced on your trip that he had an STD, so you needed to be tested.
*Refused to come clean for a month after.
*Slept with OW when annoyed with you.
*But for the STD, he probably wouldn’t have admitted anything.

Germanicus, this man has weak boundaries and poor coping skills. He feels entitled to cheat on you and treat you with contempt. His behavior is appalling and you cannot trust him, no matter how much he begged.

Why should you sabotage your life with this selfish, deceitful man?

add that my dating pool is much much smaller... I’m Jewish and personally only want a Jewish guy

Not sure what that has to do with someone who's cheating on you. Would you only leave if you had someone else to go to? Personally I'd leave now and worry about the future later rather than sticking around in case the next relationship doesn't pop up the next week.