A friend of mine asked my LTR to hang out one-on-one to go to an event in our city. She turned him down and told me the next day. My reaction was amusedly asking her "Did he really think you'd go on a date with him?"

Now the question is: Should I tell my friend not to ask my ltr to hang out one-on-one? I want to avoid mate guarding, because I think it is weak shit. But I also disliked the behavior of my friend.

Edit: Thanks for your feedback. After some consideration, I won't confront my friend because mateguarding doesn't make sense. But I also won't cut contact with him, because I see some good character traits in him (ambitious in university, trying to improve himself etc.), have alot of common interests and like hanging out with him. If anything suspicious will happen in the future, I'll need to cut him out though.