well it seems like you had a lot of sexual experiences at a very young age and this has left you very confused. usually between same age kids this is normal and considered exploring. you dont reveal how old the other kids were but it seems that you were engaged in much more than exploratory behaviors due to the frequency of which you were involved in these acts. it may be helpful to you to find a therapist who deals with abuse/sexual/gender issues to talk to and help you sort out your confusion and trauma.