Well I know it is natural for a guy to not be able to control a boner in there puberty years but like I was making out with my g/f then I just came...

I told her I peed myself(hey its not as embarresing is it?)

So I don't know what to do...

Goku, what you are describing is SO VERY NORMAL. Most guys do get that excited and do ejaculate in their pants when making out with their girls. Frankly, I think it is less embarrassing to admit that she made you come, than to tell her you wet your pants. Next time it happens, tell you she makes you so hot that you can't control yourself and it happens to all guys who have hot girlfriends. After the shock of it, she will be flattered that you find her so attractive. You can't keep telling her that you peed your pants or else she will think something is wrong with you. Man up! :)

Eighter way it is embarrassing. Would you rather her laugh at you because you pissed your pants, or laugh at you because you came too soon. I think I personally would chose came too soon because at least like the other answer rightly put just tell her you got so excited and she makes you feel so good that you came.

That would be giving her a compliment.

Girls like that. Change the embarrassing situation to a situation that is in your favour and makes it good for you in her eyes.