Am i biual?confused(10 points)?

ok so i had my first kiss with my friend who was a girl and we were like 5 or 6 because we just wanted to see how it was like and i didnt deny and i liked it. and now im 15 and im starting think im bi because ive always liked guys but i always thought about how it would be with a girl and i always thought it would be fun..but sometimes i stare at girls when they walk by looking at their backsides like im saying oh their so preety.and know im also having fantasys about girls but i still love guys alot and im preety sure im gonna fall in love with a guy and get married to one but i dont know do you think im this question can either decide if i am or not thanks for helping so confused:)?