Whats going on im soo confused about this. what should i do?

well ok im 17 the girl i like is 15 ok shes awsome i mean teen model stay true even when im blue xlolx i sound like a poet but she always there for me soo we started liking each other then we decided to stay friends but we doin couple things hold hands give each other gifts etc... but the only tthing we didnt do was have sex but shes moving like 10 minutes from my house so were gonna be always with each other but last saturday her ex bf popped back in the picture im friends with her ex we used to go to the same school soo i was cool with him but i was hanging out with her bro and some of my friends durin the wrestlemania thing and i heard her say she made out with ricky ( her ex ) and she still kinda likes him soo everybody is like wow bro how do you feel about her and her ex this that and other stuff so i said i didnt care but then she calls me and then i guess i got mad or jealous and i said well hey she said something and i love you then i said no you love ricky and she was quiet for like 2 secs and she says dont play you know i love you and i said okay i love you to but my b day past and i couldt realy enjoy it cuz of this situation ever since sunday ive been thinking bout it and i dont know how i feel about this but im gonna see her tomorrow soo what should i do i guess im a lil jealous of her ex cuz i dolike her but idk i juss... cant think straight..