If I take the pills does he has to pull out or finished inside?

If you take your pills correctly, and have taken them long enough to be protected, it does not matter if he pulls out or not. If you were not taking any birth control/using condoms, you could have still gotten pregnant whether or not he pulls out. Pulling out is not a good method to protect you from getting pregnant. The pill is.

I have been the pill for 5 months and I don’t believe the pull out but I thought he still do it even if I am using the pill

The pill is an effective standalone method of pregnancy prevention. As long as you’re using it as directed.

The pill is made for preventing pregnancy, therefore it prevents pregnancy.