AIBU to not want to go?

[DevotionAndDesire]

I made plans to go out with a friend today, we where going to go to for a walk and a picnic with DS in the woods a few miles away.

I texted her an hour ago to see what time she wanted to go and she replied saying "do you mind if I bring DP".
Usually I wouldn't, he used to be a friend, but a few weeks ago he had a go at me, for no reason, and said he couldn't stand me and my 'self absorbed ways'. I haven't spoken to him since, and am still upset. He never apologised.

I could say I do mind, but I don't want to sound be childish.
But I don't want to spend my Saturday afternoon with him.

It has really spoiled my mood and I don't want to go at all anymore.

Am I being unreasonable? And should I just suck it up?

He was a complete dick and said some really nasty personal things, (it wasnt a drunken thing) and has no once made any attempt to appologise for what he said.

It's a picnic with her DS. I don't know how old he is but I doubt that it would be appropriate to have any "air-clearing" discussion while he is there, just in case it turns sour.

OP I really hope you didn't go but if you did, I hope it's been ok.

YADNBU guy sounds a total dick, hope you explained why you aren't going. My friends dp has been trying to split us as friends for years I just don't speak to him or see him. I refuse to let him win especially as we have been friends for so long. She has lost friends through him.

Agree with marcopront, does he want to take the opportunity to come along and apologise to you? Even if he does, I don't think an outing in the woods with your DS in tow is the right time and place, in case cross words are exchanged and you become upset.

Why, if he's not interested in being around when she's had a hard week and writing herself off drunk is he suddenly interested in muscling in on your planned afternoon out? I don't get it.

IF he was trying to split up the friendship, I can see why he'd want to tag along or try and stop it happening - he might not want the OP and her friend to get together without him and have a bitch about what he said/did. Which in itself would be rather self-absorbed (if that was the case) because they probably have plenty of other things to talk about than him.