I feel like i'm losing my best friend ?

Okae so on the last week of school i had been hanging out with my friend D (i'm not gonna say his name so i'll just say the first letter) after school while i waited for my bus . One day her boyfriend came to the door and was like let me in ! but the security guard was like don't do it and plus he had been acting fake towards me like i would say hi and he'd be like no i don't wanna talk to you no . so i was like whatever i'm not gonna talk to you then . so me or D didn't let him in and he walked away . so the next day his girlfriend ( which is my best friend ) came up to me and told me i should apologize because he was trying to get to study table quicker and he's still iffy about the whole situation that happened w/ me and him before and now he thinks im better than him because i'm always w/ D . i never did apologize because i didn't feel it necessary too . i'm not gonna kiss his *ss i didn't even do anything . so ever since then my best friend had been acting funny towards me like not talking to me and i tried talking to her and she juss acted like she wasn't interested so i left . i miss her not gonna lie = ( D said that i shouldn't be worried because she wasn't a real friend anyway because she wouldn't let a boy come between us .