Im confused about whether im bi or if im just over thinking things :/

Okay well im 16 the furthest ive ever gone with a guy is making out and ive never wanted to do anything with a girl. For the past couple of weeks i dont know where its come from but ive started to question if i am straight or not. I used to masturbate to same sex and different porn but then started questioning does this make me attracted to girls?! Then if i notice a girl is pretty im like does this mean im attracted to her?! Then ive been feeling really upset with myself because i keep thinking am i bi or a lesbian. I dont want to do anything with a girl but then im like well how do i know because ive never done anything. Then i started googling am i bi then saw a couple of answers that talk about an OCD about being afraid of being a lesbian when your not. Ive never thought about girls in a sexual way and i can and want to see myself being married to a guy with kids. Ive got nothing against lesbians but it just really freaks me out and scares me. Ive never had a crush on a girl. Am i over thinking this to the point of pushing it in to brain that i could be attracted to girls?! When i try to think about girls in a sexual way it feels like its not me doing the thinking. But then im like well am i secretly attracted to girls and im just trying to make excuses? I cant talk to my family about this and im just making myself really anxious and sad any help would be appreciated..