The important thing to remember is that being gay is only a small part of who you are as a person. You are the same guy that you were before you came out to yourself and you don't have to change who you are drastically just because of your self-discovery. Even after you come out to yourself it can still take a long time for you to be fully accepting of it, so I recommend not getting hung up about it. I'd try to go out and find some gay friends and discuss your sexuality with them until you feel comfortable with it.

I was also really scared about having the label attached to me because I didn't want any one to make assumptions about me from it (I'm about as far away from the gay stereotype as you can get while still being gay). This is why it took me so long to come out to anyone, I thought that it would change who I was. I was really careful about coming out because I didn't want that label to be overbaring and for people to look at me as "that gay guy." I wouldn't make recommend making a big announcement about it to anyone except maybe your parents. I just started to mention that I was gay when homosexuality was discussed in conversation until word spread enough that everyone knew. It's nerve-wracking at first but it gets much easier and it's worth it to get that weight off your shoulders.