Hi there
The confusion that you are going through about your sexuality at the moment is quite normal so please don't worry. Many teenagers go through this stage of not knowing whether they feel attracted to boys, girls or both. No one should be bullied for this either.
You will feel excited about sexual activity and may think about it a lot, but this is all normal as a growing teenager. Whatever you feel comfortable with will be your choice.
It is a private matter for you and your family and I would think about talking to your mum or dad about the feelings you are going through. Don't forget they were teenagers once.
Take a look at the information on the ChildLine explore section about sexuality and also check out www.childrenfirst.nhs.uk/teens/health. This web site is an easy to read and written for young people. Have a look at the ChildLine message board about this topic and see what other ChildLine users have said.
Also have a look at www.teenissues.co.uk this provides useful information and support.
Hope this helps
Take care
Sam