Whats this girls problem?

Ok so this girl that i think is mad cute, i was standing in lunch and she was staring at me and so her friend came up to me and siad hey did you know so and so is good at math out of the blue moon, and she was telling her friend to shut up in an embarrasing manner, and so i walked away and they followed and i saw them look at me from a far and they kept looking and i looked back, i barely know this girl so do you think they were making fun of me cuz they think i look dumb or something. ALSO her best friend is a good friend of mine so i texted her friend saying cuz they have this joke where they are boyfriend and girl friend even though theyre both girls, and i texted her friend saying Howd you pull such a mad cutie as a boyfriend im kinda jealous, and she laughed, do you think my friend told her? So today i saw her and she ped by and checked out my other friend right in front of me, and i was kind of jealous, and also today i saw the two girls (the girl who told me "oh shes good at math" looked at me) talking with my good friend thats a girl and they were talking about the math incident and how the girl was not good at math, and i wasnt really paying attention, so maybe they were making fun of me? But she looks straight ahead when she sees me in the hallway alone but when shes with friends she talks to me why is that? also my other good girl friend and her, they were making fun of size of , all in play of course but who does that??