Should i be worried about his "close" friend?

Okayyy, here's the storyy.
I am 16, 11th grade at hightschool.
I dont really need help, I just like to see
How other people think about this.

Okayy, so, yeah. We have football games every friday night or saturday games.
So, on fridays, the varsity...

football players always give their jersey
To a girl to wear (if they want to)
And so, I have been wearing this guys for a few games.
Its cute, right.
We were hangingout at school functions, like
Sports games and stuff like that.

Then we were hangingout at my house, a couple times just us.
Nothing happend, dont worry.

So, he was talking to me, and he think we are together kinda
And im like..well I really dont plan on dating right now. I dont want to.
So he;s like, no thats fine. We;ll take it real slow, no rush.

But everyone knows we are kinda together, were a thing ya know.
And, he has this friend.
Who is a girl..my grade..I dont exactly like her.
He says they are really close friends, and tell eachother everything.
Well, I heard a couple months ago they were together, and thats how
They became so close. I heard they hooked up a lot, and
Hungout a lot.

So im going to believe there isnt any still sort of attraction?
Well, I'll sure tell you, I still flirt with my ex boyfriends and people
Who I used to be with..so yeah. Im a btt worrried.
I should probably talk to him about it, and I iwill.

Dont get me wrong, im going to mention her,
I just dont wanna look crazy .
I dont want him to think im too protective yet,
I mean, we arnt even close to dating...but I dont want
Him being with her and me, hellooo. Not going to happen.

K, so, yeah, if you wanna say something go ahead :]