HELP I DO NOT WANT THIS TO HAPPEN HELP PLEASE?

Im a 14 year old girl and all my life I have had crushes on guys,lost count of how many... Anyway the other day my friend on fb she posted a mirrior pic and she was just so pretty,her body shape and face were so pretty and perfect...I could look at her forever...Anyway after I thought that now Im thinking im gay...I wasn't thinking anything weird,but now Im all thinking is "omg im going gay" I don't wanna be with a lady all my life :( Im crying...also I have nothing aginasit gays AT ALL I just don't wanna become one,okay...Am I? I always had crushes on guys....But now I think im gay? am I? am I slowly turning gay or something help :( help