@divinepk3r – everyone else has answered this question from the point of view of being an adult. However, you identified yourself as a teen, and I want to try to answer from that point of view.
It’s not that adults are wrong – it’s just that you’re in a different place in your life than they are.
As a teen, you’re going through all sorts of changes – growing, getting smarter, hormones, maturity, the whole works. Hormones are what make you discover the opposite sex – it’s what drives a lot of what you do. Remember that until about 100 years ago, most girls were married by age 18–19, in some civilizations even earlier.
From an anthropological point of view, ancient tribes used to marry off their kids to other tribes very early – like age 16–17 – in order to have lots of babies and strengthen the tribe.
So… if you’re a teen, you’re sort of anthropologically trained to be interested in the opposite sex right now. It’s what 40 million years of evolution have produced.
That’s doesn’t mean that you can’t be ‘just friends’ – but it does mean that you are working against your hormones and the history of humanity.
Bottom line – it’s tough and it’s rare.