Help i need to chill

so i'm datingthis guy and his a year older than me in scjool. his friend group is really close and they're j affectionate people so inthat aspect i fit right in. his ex is a part of the group which i didn't mind at first cuz i love her i went to middle school w her and i know her mom she's so sweet. and now i've just been getting really jealous and angryever since i found out they lost their virginity to eachother. i shouldn't have assumed but i assumed he was a virgin. now they'll always have this connection of being each others firsts. and we won't be having sex cuz i'm waiting till marriage so the thought of them together and me not giving him what she can scares me

it's dumb and they were close before they dated and he broke up with her but ugh i'm so insecure. she's gorgeous and doesn't wear makeup and has a nice butt and they do swim together and like i said they're an affectionate group and they'll rough house a bit and one day he was being weird and was standing behind her in the room we eat lunch and was touching her hair.

she's so great and ik why they broke up (she wasn't giving him space) but that's fixable and idk. the fact they had sex just really irks me and makes me annoyed at things she does.... like posting gorgeous selfies during golden hour

she's in the pink i'm in the blue. i ha e a full face and fake lashes on and she's wearing mascara and eyeshadow. a literal goddess. and my boyfriends ex