This applied to me as well. I didn't admit I was attracted to women until I had already married a man. So when I came out to myself, I thought I HAD to be bisexual. It was much easier to come out as bi than it was to come out later as gay. Bi allows room for monogamy with my husband. Gay does not. At least not in a way that's healthy for both of us. I think this is pretty common. It unfortunate because I'm sure it does not help the bisexual community, but I truly did not consider the option of being gay at the time. I feel bad for adding to to the stereotype though.
some people in the bi community do the reverse and come out as gay and your right bi now and gay later doesn't help the bi community .
I think part of the reason I'm only acknowledging my gayness now is because I kinda assumed the feelings I had for other girls were just friendship or jealousy. Didn't realize that level of obsessiveness actually had to do with sexual attraction bec I didn't even know that was possible when I was younger.
