You're going to be alright brother. Growing up is confusing. Plenty of males and females experience SSA as kids and even act on it and end up in monogamous heterosexual relationships later on. If you're attracted to a girl, go for it. You're literally made for it. Even if SSA persists, you're not simply your attractions. You are not 'gay'. You're a complete and complex person with a wide range of inclinations and desires. There are people who have never even been attracted to the same-sex who still worry that they might not be straight just because they can't confirm that they are in fact straight. Its a super easy thing to worry about when you're growing up. You don't need to figure it out by testing yourself with pornography or anything else. You know you're a dude and you know who you're permitted to be with. If you meet a girl you're into, go for it. If you don't, be patient until you do. You're going to be alright. I promise.