Can this be considered a reason?

Okay, I just recently posted a question asking how to go about being gay around my family, and stuff. I've been thinking, and just realized that, my uncle was gay, my cousin is gay, I'm gay, and my other cousin is . Is ity hereditary? I mean, the people who are ual are on my dad's side. Also, this could be reasoning because I remember when the Titanic came out, I thought Leonardo DiCaprio was cute. I remember it vividly, so I know that it's not made up. I was laying on the floor with my mom, and brother. We were watching Titanic, and I remember saying, "He is cute." and my mom telling me not to say it again. I dunno. So, any advice? lol