Boyfriend's best friend is being a complete perv.

[StickyCarpet]

I'm not the best at standing up for myself, I'm also going through some really shitty mh issues so my ability to manage things isn't so good.
I'm trying to arrange a surprise party for my boyfriend and enlisted the help of his best friend as I simply can't do it alone.
His friend is in a relationship as far as I'm aware but keeps sending me really inappropriate messages......he seems to turn the most innocent of conversations round to an innuendo. If I tell my boyfriend it will ruin the surprise of his party and I don't want to spoil their friendship.....this guy has been very good to my boyfriend in the past getting him work and helping him through tough times. He's one of those guys that has a filthy sense of humour and he has no qualms talking about very private things openly.
I've tried making a joke of it, I've tried ignoring his comments but he's not taking the hint that I don't want to discuss sex/lesbians/dildos/fingering myself with him.

I don't want to piss him off by yelling because I really need his help to sort this party, my boyfriend has been my rock recently and he deserves a really special party. But equally I don't want this guys leud messages popping up on my phone every evening.

"I'm really not comfortable discussing those things with you. Please stop"

That's all you have to say.

If he doesn't, tell him you will forward the messages into his mother. See if she finds them funny.

Ok thanks. I know I probably sound pathetic but I genuinely don't have the mental capacity for it at the moment and the last thing I want to do is lose his help for planning the party.

'Help plan the party dickhead and stop being a pervert'

You've had 2 good suggestions here which you've refuted. What do you want people to say here, if you aren't going to tell him to stop...?

Confusing.

If he’s got a girlfriend, could you get her to help with the planning? Then just do it on a WhatsApp group.
Tbh I think your bf would want to know if his friend is talking about you bloody fingering yourself 😳

He obviously feels you ‘owe’ him since he’s helping you. Ugh. What a man.

What help do you need from him? Is there no one else you could ask?

I’d go for just turning the convo back round to planning if you really need him. Then after the party tell him to go fuck himself.

MistressDeeCee.....not sure if you are reading the same thread.....I haven't refuted anything. I thanked the poster for their suggestion and next time he tries to change the conversation I'm going to copy and paste what donkryears wrote.
I was just looking for a bit of support. Perhaps next time someone clearly states that they are suffering from mental health problems you could show a bit of empathy. It costs nothing to be nice.....or failing that just keep scrolling.
My boyfriend lives in another town and I don't know all of his friends, he's a pretty popular guy. I'd like to ensure the right people are invited and his best friend knows all the same people so it seemed logical to get him to help.