Having a crush on twins...

Im a 17 yrs old male supposedly bi.I'm not really sure what this is supposed to be. There are 2 twin brothers I know. I talk to them every now and then and see them every day.I used to have a crush on one of them, but lately, it seems like I like both of them, somehow.I am more, should I say...sexually attracted to one of them, but I feel more romantically attracted to the other one.It's not like this week I like one twin the next week the other. It's somhow simultaneously. I do feel a stronger attraction to the latter one though.In case it matters, not sure if any of them is gay or bi, but a guy can hope.