Okay so like a couple weeks ago they started to go out. Him and this girl. He talked to me And Also the next day.. He was hit me with a basketball and supposedly trying to hit his brother. Then he was saying he had skills that he knew how to play basketball( he was kidding ) anyway the next day we talked and then he pulled down his pants but didn't show his thing. And his bro did it too. Later when I didn't ride the bus or go to the bus stop he will ask my friend if I was coming. Every single day. And well on a nother day he kind of hold my hand. And well he let go. Later my friend is like "dude I think he likes you he keeps On looking at you, and started to talk to you". Every single of my friends told me that. And on Monday he told me " walk with me to alternative" I'm like yea okay. So I went And he told me to go back before I would get grounded. Also my friend told me that he cared about me. Then he texted and inboxed me first and said hey and then I asked him if he wanted to go to the park tOmmor

There's no question here really. You just kind of told us a story, he has a girlfriend and he's doing this with you? Sounds to me like he's being unfaithful, did you ever think he may just go do the same with you if he gets bored of you, kind of like what he's doing to his current girlfriend?

He pulled his pants down in front of you? How old are the both of you?
This guy has a girl friend and he's doing silly things with you and you're letting him.
He's a cheater and you seem desperate.