How come people think I'm gay and have a boyfriend?

So people call me gay as in and say that I have a boyfriend just because I posted on my twitter and facebook that I like this video of a cover of a song called Fallin For you By colbie calliat done by a girl on youtube. I like the cute little girl in this video so that's the reason why I'm watching videos like this. This girl is my Idol for real and I Idolize her. It would be an honor to do a collab with her but it is impossible to do so. I'm engaged to my vietnamese girlfriend from vietnam so that should say something about my ual orientation. I'm not even no where near Gay and I just like love songs more then other type of songs. I honestly really cannot stand rap, It's too noisy. I prefer romantic music like this more. Why do people think I'm gay and have a boyfriend because of this ???