advice needed

I 15 but I'm starting to question whether I'm straight or bi.currently I like a bit and the majority of my "crushes" have been male but I have had "crushes " on girls they may not have lasted as long as other but I have had them. i don't want to talk to someone I know until I'm sure because if I say I am and I'm not I don't want them saying I'm looking for attention but I don't want to rule it out can I have advice please