Someone will be giving you an awful lot of attention today, but you might not be comfortable with it. If so, your best tactic is to try to ignore them. You can’t try to fake it, but there is also no need to hurt their feelings or embarrass them with overcomplicated apologies. Instead, just carry on with normal relations and sooner or later they will get the picture that you aren’t interested. Then they will likely give up and move on to someone else.