My penis is single 4 and half inches. and im 18. is this discouraging ?

please tell me it will grow longer.

Answers:

Average is 5.1 to 6.2 inches. Puberty can closing stages between 16-21 unless you are a late bloomer.

Learn to use what's you've be given, be a generous lover and size will NOT business.

is circumsision better than having foreskin???

it may still grow rather - but its unlikely you will be massive down there
you may get to 5 inches.
its the girth the matter to a lady.

I get circumcised this morning and when i urinate i see all the blood at the back my penis it seems resembling a lot?

I am manly with solely 4" and much older than you. I deduce you are stuck with what you own, but that is not a impossible thing. Learn to use what you get, plus there are other ways to stimulate your partner. I own made my wife have mulitple organism approaching 7 or 8 times in one session. Wanna know, email me.