Better now than later. Getting away from him now will be so much easier without the legal hoops, and if a text sets him off like that, imagine if you got a wrong phone call, or a mistakenly addressed package. Or worse someone creepy sent you flowers.

Oblige if he is willing to do the same. I've learned when someone is that insecure it's usually because they are the ones hiding something

That is not healthy. Good luck OP.

Fiancé =man Fiancée = woman This is misspelt in most FMLs containing the word and can really be confusing.

Get thee into premarital counseling ASAP. Trust issues of this magnitude should NOT wait to be addressed until after you've signed a binding legal document with this person.

Run!

Let him cancel it if he's gonna act like a child

i'm sorry but you might wanna manage the trust issues w your partner first (he doesn't seem to trust you), if he's The One then he's worth waiting for anyways

This may be a blessing in disguise. Trust is a huge thing so hopefully you guys work through it and if not best of luck to you!

The way I see it, he's either a cheater or paranoid. Either way, run.