How do I know if I like someone of the same gender
So I think its important to clear that out.
First of all we all know that lots of people (mostly girls) go out to parties and sometimes make out or kiss someone of the same gender but that doesn't make them Gay or Bi (actually this behaviour in parties is usually the result of too much drinking) but when we get to a certain age it's normal to feel curious.
There are two things that make you Bi or Gay, first the initial atraction (everyone can tell if a person is hot or not but i'm talking about Real atraction) and then the emotional part. If you just feel attracted to the person that doesn't make you Bi or Gay.