He saw it all wrong.

My boyfriend is the first boy in a long time that sees me for me, he is the best thing in a LONG time that has happened to me. Tonight we went bowling with some friends and my best guy friend which he thinks i was flirting with and all over. Now he is confused and i'm so afraid. I don't know what i would do without him. He's become my bestfriend, my boyfriend, and i'm afraid i'm falling for him. But now idk what do i do?

And what would be so bad about falling for him? If he is a genuinely good guy who seems to care about who you are as a person, I don't see why you would be afraid to fall for him. Just show him that he's the one you like.

Or tell him your best friend's gay lol

He knows my bestfriend, and i just am afraid to fall for him because i've been hurt so many times before. but i can't even tell him that i'm falling for him. I'm just so afraid that he will break up with me, and thats the last thing i would ever want

Tell the truth!