Responses
You are the one who said you would lie and say you are on a date. And it’s not considerate a date because they are going there as friends.
Also the worst in these kinds of stuff is when uke and seme are a couple. And then the seme’s friends invites him to a goukon and he doesnt know how to refuse them because he can’t tell them he has boyfriend already. As if that was your only way to say no.....

Would not have done it. Would have lied about being on a date, grabbed the ML's hand and ran away.
Never follow an ex it always brings trouble!!