On your first time, I've heard that it is likely that you will bleed, but there are a few things I want to know before doing it... will he notice when you bleed, How much do you bleed, and does it last for long ?

Yes, more than likely you will bleed. Since everyone's body is just a bit different I can't tell you just how much you will bleed, but I can tell you this, yes, he will notice. You won't bleed for long like your period, but I would suggest that you go to the bathroom and check yourself out as soon as it is over and if you were in a bed, by all means check the sheets and soak them in cold water if there is any blood on them. Play it by ear is all I can tell you.

It hurts a lot, bleeds, and there is enough blood to see... as in a big spot on the white sheets, in my case, he had to hide the sheet from his mother in the trunk of his car! :D

In most cases yes you bleed, in most cases there will be some pain, and it will be enough to notice.

He will most likely notice it when you bleed. It's hard to say how much you'll bleed and how much it will hurt since our bodies are all different. It didn't seem very much for me, but I had to wear a pad for the next couple of days.

It was a little sore for me but I never noticed more then a spot of blood and nothing else.
Everyone is different so you won't know till its done.

In your question I detect you are worried about the embarresment you may feel when all this happens on your first time. If you are worried you should tell your partner, that it is your first time and that he should take it easy until your ready to ride him like a wild horse (lol... not sure where that came from), and what he should expect to happen.