Moving on....I need advice

Jennifer • Ig: G0ldenjayy 😈💖// Sc: jenni_boo14💅🏽😝 YALL FOLLOW/ADD ME 😏😘
So like a month and a half ago i broke up with my ex, we dated for a year a six months (Longest relationship i had) so he is in jail and he gonna be in their for 15yrs and i'm 16 right now. I'm currently talking to one guy well i guess you can say dating because we've kissed already and we act like a couple but i havnt had sex with him YETTT........I know i'm not ready to have sex and he understands why and he doesn't have a problem waiting😄 Honestly like with my ex i would have sex with him all the time and now it's like i wanna have sex but ik i'm not ready like i get horny outta nowhere tbh (hate it) And i just need advice to help me out like my body wants sex but my mind is telling me i'm not ready at the same time Idk what to do 
Oh plus Is it ok to move on quick from a relationship???? Long short short he's hurt me in the past cheated on me and blah blah i still took him back yuh know but anyways i need help girls😞
Feel free to ask questions if confused