the other girl, is she a threat? Options

[LoST SouL]

so yea ive spoken about ym best friend before [yes hes a guy] but heres sum rebriefing for u people that dont relly know

so yes hes my best friend and hes always there for me he pike a father to me... hes helped me through a lot of things and he keeps me sane and alive.. it s bad but i depend on him so much witou him id literraly crumble idk wat to do... he meens so much to me hes abotut he only peson i trust and care for... hes there always .. hes like my angel my safe haven... i kud go to him for nething knowing that ill have a should to cry on, a place to run away to, some one to listen to me, some one to care about me, some one to help me... i love him [as a close friend typa love]

yea.. ok so i admit hes reeally really really cute and he's one of the nicest most considerate sweetest not to pervy [if u kno wat i mean] guy i know hes like PERFECT. so yea basically a lot of girls like/liked him... even my other friend [a gril] used to like him, they even almost went out... i'm ok with all these grils liking him... soem of them i don't know some of them ain't friends with me and some of them im mad kool with. Him dating and have other girl friends besides me is perfectly ok with me

However today was different. There is this one girl who likes him me and her arnt that kool. i'v hated her well disliked here since freshman years which is before me and my best friend met.. although i hate her me and her neva gotten into any fights or anything and i respect her and im usally mad nice to her. However, today i went over to tlk to my best friend. She was sittin next to him. So while i was talking to him i try and take his chain while sum1 distratcs him. SO i successfully get the chain but she grabs it out of my hands!.. SO I nicely ask her to let me see it, she like no i wanna see im like i took it let me see she pushes me away and tells me in a fu*ckin attitude like a little b*tch to "chill out" i was likt wtf to her its like he belongs to her! she gave me this ugly ass look wtf i was about to slap her! and another thing when i came over to tlk to my friend him and her were not doing anyhting... me n my friend were jsu tlkin n she kept tryin to change the subject or but in the converstanion and get his attnrtion away from me shes such a mother erffin b*tch!...i didn freakin slap her instadn i screamed and stormed off....

now i dont know what to do my emotions are so fu*ked up im soo angry and feel guilty at the same time... do you people think i'm jelouse? what shoud i do? should i tell my best friend how i feel? if so what should i tell him?.... basically wat should i do?... and if u ahve ever been in this situation befor... what did u do?