My best friend is jealous of me?

kayy so like i'[m in high school and ive' ben besties with this girls ella for likw 3 years- she livvves across tha street. Anyhoo, when hi scoool startd i madeeee sooooo manyyyyyy frieeends anddd sheeee only madee a fewww- i knooww suchh a looser rightt ? :P anywayss sheees actting superr jealouss and clinging. likeee wheen we aree talkking she'll bee likee whatt aree you doing t6hs weekendss, and someetimess she eveeen ks mae to hanng outt ! andd thenn wheen we doo hanng outt and i sitt there texxting peoplee she'll sayy whoo you textting. and thenn shee even goot mad at meee causee i was 3 hourrs late cauuse i was withh a frieend. ohh and shee alsoo goot madd causse ii didn'ttt call her backk and diddn't hanng out whenn i siad i wouldd. likee why is shee beingg soo b*tchyy and clinging andddd jeallous! likeee i just forgottt chill! Whattt shoullld i foo? Shouuld i jusst leaveee her cauuse she isss ovverreacting ad aa b***tch . ? THANKK