I was just wondering, does it make sense to spend your whole life liking guys and then suddenly, when you're 15, fall in love with a girl? I'm a girl myself so...I didn’t know...
It is indeed possible to fall in love with a girl even if you liked guys for your “whole life.” It is also possible for people in their 20s, 30s, 40s, 50s or older to discover that they prefer same-sex relationships. You get the picture, right?
Now, whether falling in love with a girl after years spent liking guys means that one is a lesbian, bisexual, or simply a heterosexual who happens to love a particular girl, no one but you can say. And even for you, it may take years before that becomes clear.
In your case, your “whole life” is still beginning, and you are starting to figure out who you are, what you like, who you love and a lot of other important issues. If it possible, try not to worry about what it “means” and just enjoy being in love—whoever the object of your attention is. It is a wonderful feeling that you are very lucky to be experiencing!