So thats it. I am saying I'm bisexual because I'm not sure what catagory people would call me. As I said, I love girls but I also love when my friend Garry sucks me so in that way I like both.
You aren't bisexual. You are an abused child, taken advantage of by an older boy. You never were able to say no, so it was never your choice. You aren't attracted to males or doing other things with guys than what Garry does to you. If he forced you to suck his dick, you would eventually come to like it, even if fucked you in the ass. Girls who get raped sometimes orgasm, but it doesn't mean they liked it, but it can confuse them. You like what he does, because he's done it for so long you don't find it weird, like other things. It feels good, but that's how the abuser seduces you.
You wouldn't even have considered it if Garry didn't press the issue originally, so how can you say that it's something you really like and base your sexuality on it? You are still underage and I would recommend you go to an adult you trust and tell him or her what's been going on. He may be doing this to other 10 year old boys.
Id suggest you not overthink it. Think of it this way: If you were blindfolded, and couldnt touch anything...and someone gave you a blowjob, if they did it well, you would enjoy it. The only way you can tell the difference between a female mouth and a male mouth is to know that one or the other is doing it. Id say you were bisexual if you actively desired consentual sex with both males and females.
Id say all we can conclude is that you like blowjobs.