I got 2 in numerology. But I mean, who doesn't like peace and harmony?
I also can delude myself into thinking I have 11 master number. But eh, the point is whether or not you get the number, you should strive for the meaning of what those numerology "characteristics" are. Hell, I can choose to be number 5 and having that sense of freedom or number 1 and be the leader.
It's quite irrational to question if someone being loyal and trustworthy based on a sun sign or zodiac sign. Therefore I think your assumptions on her is irrelevant.
It could be that she considers relationships are important therefore she takes interest in you having someone around. Or, she may think your bf is cute. It could be any other reasons. Why don't you use that superficial 'like' interactions on facebook to start a real communication with her? Like, "hey, i saw you liked my pic post with my bf, he's cute, right? So how are things with you? We haven't got a chance to talk" blabla bla
I think it's better to do it that way then assume things on your own and try to find any sort of assurance of your opinions (whatever the term it is, I can't think of the word for that)
Probably he's phobic of crowds.. or there is someone whom he knows attending the party, maybe he's nervous because it's his first job, idk there could be hella other reasons that may not have anything to do with how he looks