How can i stop myself from that feeling to cheat?

i love my bf 2 death. i want 2 spend my whole life with him. but i so promiscuous. like 4real im such a flirt and did some things that made me look like a slut. im 17 yrs old right now and since i was 14, i had more than 12 bfs and im not counting the ones that was jus a fling. but i changed so much since i met my current bf. i changed cuz i feel like hes the love of my life. BUT i get so much attention from guys and ITS SO HARD not to cheat. I dont want to start my promiscuous behaviors again. i jus crave attention. i need that constant attention from my bf. am i being selfish cuz it hurts me but i cant help it. idk what to think or do... por favor i dont want to mess things up.