Questions about being bisexual

Hello reddit,I am a 15 year old male and this past year has been confusing as shit for me. To start off, I have always had an attraction for women(I mean boobs are awesome), but recently I have also noticed a small attraction towards men. Granted, it's not anywhere near as strong as it is towards women. When it comes to the attraction towards women there was a physical as well as a sexual attraction towards them. But for men it was different. I can find some men attractive, I can even see myself kissing/making out with a few. But I have never found myself being attracted to any sort of sexual actions being done with a fellow man. So I must ask, if I was indeed bisexual, would I know immediately? I have come to terms with it and think it's ok, but I really don't know if I should have always had an attraction to both genders, or maybe it's going to be something that will build up over time, or something else completely different. Sorry if I rambled, or am not clear with my thoughts. And thanks for any help any of you can provide :D