Insecure and stupid

Kerrigan
My boyfriends brother has this new girlfriend and I think she's prettier then me. I'm so scared to have her around the house now because I don't want her to think she's prettier or has a nicer body then me.. Before she even knew my boyfriends brother she used to try to add my boyfriend on Facebook all the time and that makes me nervous that when I'm not there she will do something.. Idk why but I'm a very insecure girl. My boyfriends brother doesn't ever really look at me or pay attention he's pretty awkward, I mean obviously if I randomly walk in there house he looks but then quickly looks away. My boyfriend is observant likes to keep looking and wander and it really makes me nervous😢 have any of you ladies dealt with things like this and if you have what did you do to help make the situation better. (I'm friends with this girl on Facebook and I try to be friendly and she is friendly back but just scared my boyfriend will think she's better then me of prettier) 😖😭