Lesbien / Gay = Du like Mehr guys / girls (deepends on your sex) Bisexual = Du like both. For example Du are in Liebe with boy but Du are girl but Du like sleeping with boys.
Lesbian/Gay - Du are a female/male who enjoys sexual connection with other females/males Bi-sexual - Du are a female oder male who enjoys sexual connection with both sexes.
Usually Du experiment with both sexes before realising, just make sure that if Du are only experimenting with someone to tell them as if they fall in Liebe with you, and Du realise Du are straight oder whatever, it won't come as a herz break.
well about a Jahr Vor i was datin a really hot gur...he was great,but i found mi self lookin at other girls and thinkin about them the same way i thought of mi bf...thats the Tag i reallized i was bisexual