Is this a red flag?

[Deltadelight]

I’ve been seeing a guy I met online for around 5 weeks, having come out of a toxic, upsetting relationship six months ago in which I had very little control and lost a lot of confidence.
He’s lovely and a gentleman and we’ve had three successful dates, though on the second date he mentioned an event in late July that he’d like to take me to, but nothing was fixed & it wasn’t mentioned on our 3rd date.
I was then invited by a very dear friend to a weekend away, mostly paid for by her, to accompany her for something she had to do abroad plus some downtime for sightseeing etc.
I agreed, and let him know via message straight away.
He ignored my message for 24 hours, eventually messaging me in his normal fashion on a completely different messaging platform, which I found odd.
Since then he’s bought up the fact that I’ve “let him down” (he was still planning to attend the event on his own, even before we met) about ten times during different conversations.
I have apologised wholeheartedly, but explained that it was only a loose arrangement. He mentions it only in a jokey way but it’s starting to wear a bit thin and it’s pissing me off. I’m starting to get the ick over it.
Am I being unreasonable?

I meant to put ‘invited to a weekend away on the SAME day as the event’

If he is already pissing you off after 3 dates, dump him immediately

That is ten times too many. He didn't tell you the date of the event so it was hardly a matter of letting him down. He just didn't like the fact that you had other interests in life and felt that you should let your friend down after agreeing to go. If this is what he is like in the first five weeks and three dates, I shudder to think of his entitlement six months in. He is neither lovely nor a gentleman.

3 dates… He’s showing you this side of himself after 3 dates.

I would ask him to drop it now and see how he reacts

@Deltadelight

yea red flag indeed

Tiannanmem square called. They'd like their red flags back.

Yeah that would severely piss me off he will become increasingly controlling if you continue to date him.

I'd be telling him you'd hate to let him down again on other occasion so best call it a day.

Yeah block him, not worth the hassle. 3 dates in you don’t owe him anything anyway, so why should you keep that weekend free when it was a loose arrangement anyway.

Walk away. Three dates in and he is already like this. No thanks.

Dump!

Massive red flag. He’s testing the water to see how much he can get away with and whether you have weak boundaries he can take advantage of. Your life will be hell with this person. Walk away & fast!!