Help me please I am soo lost and confued...should I stay or leave her? );?

okk, please help me ive been soo stressed out way more then i evr have ): ...ok soo me and my girlfrind r both 14 and weve been together for a little longer then 3 months nw and neithr of us have evr evn felt soo inlove as we are now..and we are very open 2 eachother and say and tell eachother everyhing but last week i was getting annoyed cuz she always talks about this other boy and soo i asked her if she likes him and she said...yes....and i wanted 2 brk up wth herut i gave her a second chance cuz we love eachother soo much!! and finall 2day i asked her who else she liked cuz weve already been kinda upset l8ly cz of that and she told me about another person and shes been rly upset cuz she didnt wanna tell me, not 2 mention her last boyfriend she dated broke up with her after 5 months cuz she liked someone and she like honestly cant help starting 2 like people...and i told h if she likes other peopl soo much then go b with them and she saidnoo she juist likes them but she loves me way more and wants 2 be with me....so i rly just dont know wat 2 do or if i evn should stay with her cuz she like beautiful and nice and popular and everything and i know ill nvr get someone as good as her again but its not fair that she starts 2 like someone, soo wat should i do? i wanna stay with her but i have 2 ask myself...is it rly worth it or not? if anyone else has ha this happen or can give me some good advie of wat 2 do then..please help me i rly need it right now ); thank you everyone