Most Helpful Guy
Give him a few days but after that he really should have forgiven you for the mistake of beeping at her and decided that he won't let someone else's psychological problems come between the two of you. If he seems too willing to let this come between you try to get him to see that that's not fair on either of you. The two of you shouldn't be split up by someone else's behavior .
Re: the general problem of this girl and her strange behavior , she needs psychological help from a professional. I wonder if she is getting any and if not whether there is anyone who can convince her to seek some? Stuff like this never ends well for anyone, least of all the person suffering the pyschological problems, without proper intervention.