Just because you once acknowledged that a guy was good-looking does not mean you are gay or might be. Girls/women will talk about other girls/women's looks all the time and say things like "She's so pretty" or whatever, it doesn't mean they are lesbian. We can acknowledge someone of the same gender is attractive and perhaps even admire their good looks and still be 100% straight. There is a baseball player who I have thought must drive women crazy and I wish I could be young again and that good-looking. Doesn't make me gay or bi or anything like that. Relax, you sound like you are definitely heterosexual. Stop obsessing! Easy to say, I know.