Let me say first that I am 18 and I have a friend that's a guy that I have been knowing since junior year and I'm now a senior. We have become so close we like the same movies, music we like the same hobbies, sports and things in general basically we are very similar everyone say we are , we've actually been thought to be brothers one time. To get to the point I've really grown to love this guy. We hang out a lot he really cares about me and tends to take interest in anything I do and vice versa. We get along well we get mad over little things each other do and we tend act like a couple. But he has a girlfriend that he has been going out with for 4 months now he even says he loves her and wants to marry her. I also enjoy women but also guys I'm slowly but trying to except my sexuality, trying to finally tell myself that I'm bi. It hurts me to hear him talk about any body else in a intimate kind of way I love everything about him were both attractive all around typically well built well known high school guys him lacrosse me swimming and we also both can sing and dance I just really want him physically and emotionally I'm just scared to say anything and on top of that we hug when we say hi and goodbye and lately when we hug he gives me a kiss on the neck I refuse sometimes and laugh because I don't want to seem gay and we just get so close sometimes we give eye contact a lot he smiles at me and I blush and we always have good conversation I woukd fight fir this guy anything he needs or wants I will try to get vice versa but I just need help I don't know what to do or what to make of this any advice ?

Depending on where you live, in the US most guys do not kiss each other hello or good bye,
Some cultures do this.

So tell him, if you are bi, but being bi does not mean he should have low morals, so he has a girlfriend, so he can not and would not date you.

Yea I live in Georgia that's not part of my culture.. I just don't want to ruin anything and Im not out yet and because my mother is gay and their was some disappointed members in my family I just feel like it would be even worse if I just followed in her footsteps... I'm just scared what my dad, grandma and family in general would think I mean I do want a normal life, I want a wife kids a regular household.. But I just can't see me going off for college without telling my friend I just love this guy to the moon and back I just will have to confess up one of these days

Fine line!

You want to tell him.
But! You don't want to lose him either.
It's hard to find anyone.
Who can make us feel the way we do about the other.

So you ave a guy friend that is a close guy friend.
2 choices!
1. tell him how you feel.
2.accept the way things are.

If you accept things the way they are.
Then you still have a close friend as long as the 2 of you want it to be.

I would take a step back and perhaps do your own thing away from him for a while and get your head straight before you make any rash decisions.

You do not want to risk telling him you want him in 'that way' as you may ruin your friendship. As he has a girlfriend experiment with others who perhaps want the same as you.

He is your best friend and he has a girl friend. What would be the point in telling him anything like that? Is it to possible get his attention? That is wrong.
Stop spending so much time with him.