At school we were pretty much half and half (I went to an all-boys school): there were about 8 of us in our circle of friends and 4 of us have come out as gay or bi since school. The other 4 were/are straight. It's never been an issue lol
Of my friends now I still would say it's about half-half. I only really begin to shut out straight guys if I pick up a sense that they are weird around me, or judging me, or are just flat-out homophobic
Otherwise I don't really see why this thread would be a question.