To end my relationship over this

[herewegoagain7]

I have been with my partner nearly two years, however he has always been a bit insecure and always asks lots of questions about former partners
We met online dating and he asked me the other day how many dates I had been on, we were on a nice day out and I didn't feel like the interrogation so I said shall we speak later
He has now been sulking for two weeks, been distant and cold and then said he can't trust me

Yep big red flag. I’ve had this happen with a partner. That insecurity will not disappear. He also used it against me in arguments and behaved like I had cheated on him due to the jealousy. How dare I have had previous relationships!! You will need to leave now before you start getting more involved and finding excuses for the behaviour

It's all good advice, I really don't know why I haven't seen this coming but he has ramped up the sulking the more comfortable he felt

I have seen him sulking with his ex wife and saw messages when she called him childish

Thankfully I have a work tried planned so that I can have some space and end it

Very important: Before you end it, make sure you have already changed the locks… if you don’t want to do that, find his set of keys and discreetly confiscate them.

If you have anything of value at his house, quietly remove those, too.

Remove him from your social medias, so that he is not snooping/mining for info after the fact or still have direct access to your friends/family/colleagues - possible overt/covert smearing is a well used tactic, make it harder for that to happen, and let people know asap that you have broken up.

Have the breakup conversation in a public place.

If possible, blame the breakup on something other than his inadequacies… this type can prove vindictive when feeling rejected/slighted.

Good luck and let us know how it went.

I have learned this the hard way, from people you would not expect to be like that. What you have described is in fact exactly the type one would expect to be like that.

He is clearly sulking again now so I have asked him to give me some space, have actually got the ick now so all these lovely supportive replies have done me a favour

Give him this message from me -

'Get a ruddy grip and get over yourself you great big baby man child! Pull yourself together and start acting like an adult you pathetic little worm.'

By giving him space, you're also giving him the opportunity to change tack completely, and go into panic-bonding mode, which is just the same bloody side of the coin.

End it. You know better than this.

Don't give him space. He will adjust his behaviour just long enough to convince you he's working on it. Then when you are comfortable again he will huff. If you love this dynamic carry on. You know what you need to do OP :(

As PP said get your things out of his space. Get back keys etc and then when safe end it and block him. There is no other way to deal with someone this age behaving like this.